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class="mw-list-item"><a href="/wiki/Special:%E6%88%91%E7%9A%84%E8%AE%A8%E8%AE%BA%E9%A1%B5" title="对于来自此IP地址编辑的讨论[n]" accesskey="n"><span>讨论</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="站点"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="目录" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">目录</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">移至侧栏</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">隐藏</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">序言</div> </a> </li> <li id="toc-解释" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#解释"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>解释</span> </div> </a> <ul id="toc-解释-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-模拟系统" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#模拟系统"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>模拟系统</span> </div> </a> <ul id="toc-模拟系统-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-數位系統" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#數位系統"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>數位系統</span> </div> </a> <ul id="toc-數位系統-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-網路服務" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#網路服務"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>網路服務</span> </div> </a> <ul id="toc-網路服務-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-参见" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#参见"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>参见</span> </div> </a> <ul id="toc-参见-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-外部链接" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#外部链接"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>外部链接</span> </div> </a> <ul id="toc-外部链接-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="目录" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="开关目录" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">开关目录</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">带宽</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="前往另一种语言写成的文章。44种语言可用" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-44" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">44种语言</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Bandwydte" title="Bandwydte – 南非荷兰语" lang="af" hreflang="af" data-title="Bandwydte" data-language-autonym="Afrikaans" data-language-local-name="南非荷兰语" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B9%D8%B1%D8%B6_%D9%86%D8%B7%D8%A7%D9%82" title="عرض نطاق – 阿拉伯语" lang="ar" hreflang="ar" data-title="عرض نطاق" data-language-autonym="العربية" data-language-local-name="阿拉伯语" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%95%E0%A6%AE%E0%A7%8D%E0%A6%AA%E0%A6%BE%E0%A6%82%E0%A6%95%E0%A6%AC%E0%A7%8D%E0%A6%AF%E0%A6%BE%E0%A6%AA%E0%A7%8D%E0%A6%A4%E0%A6%BF_(%E0%A6%B8%E0%A6%82%E0%A6%95%E0%A7%87%E0%A6%A4_%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%95%E0%A7%8D%E0%A6%B0%E0%A6%BF%E0%A6%AF%E0%A6%BC%E0%A6%BE%E0%A6%9C%E0%A6%BE%E0%A6%A4%E0%A6%95%E0%A6%B0%E0%A6%A3)" title="কম্পাংকব্যাপ্তি (সংকেত প্রক্রিয়াজাতকরণ) – 孟加拉语" lang="bn" hreflang="bn" data-title="কম্পাংকব্যাপ্তি (সংকেত প্রক্রিয়াজাতকরণ)" data-language-autonym="বাংলা" data-language-local-name="孟加拉语" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Amplada_de_banda" title="Amplada de banda – 加泰罗尼亚语" lang="ca" hreflang="ca" data-title="Amplada de banda" data-language-autonym="Català" data-language-local-name="加泰罗尼亚语" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/%C5%A0%C3%AD%C5%99ka_p%C3%A1sma" title="Šířka pásma – 捷克语" lang="cs" hreflang="cs" data-title="Šířka pásma" data-language-autonym="Čeština" data-language-local-name="捷克语" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/B%C3%A5ndbredde_(signalbehandling)" title="Båndbredde (signalbehandling) – 丹麦语" lang="da" hreflang="da" data-title="Båndbredde (signalbehandling)" data-language-autonym="Dansk" data-language-local-name="丹麦语" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Bandbreite" title="Bandbreite – 德语" lang="de" hreflang="de" data-title="Bandbreite" data-language-autonym="Deutsch" data-language-local-name="德语" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%95%CF%8D%CF%81%CE%BF%CF%82_%CE%B6%CF%8E%CE%BD%CE%B7%CF%82" title="Εύρος ζώνης – 希腊语" lang="el" hreflang="el" data-title="Εύρος ζώνης" data-language-autonym="Ελληνικά" data-language-local-name="希腊语" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Bandwidth_(signal_processing)" title="Bandwidth (signal processing) – 英语" lang="en" hreflang="en" data-title="Bandwidth (signal processing)" data-language-autonym="English" data-language-local-name="英语" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Ancho_de_banda" title="Ancho de banda – 西班牙语" lang="es" hreflang="es" data-title="Ancho de banda" data-language-autonym="Español" data-language-local-name="西班牙语" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Ribalaius" title="Ribalaius – 爱沙尼亚语" lang="et" hreflang="et" data-title="Ribalaius" data-language-autonym="Eesti" data-language-local-name="爱沙尼亚语" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Banda_zabalera" title="Banda zabalera – 巴斯克语" lang="eu" hreflang="eu" data-title="Banda zabalera" data-language-autonym="Euskara" data-language-local-name="巴斯克语" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%BE%D9%87%D9%86%D8%A7%DB%8C_%D8%A8%D8%A7%D9%86%D8%AF" title="پهنای باند – 波斯语" lang="fa" hreflang="fa" data-title="پهنای باند" data-language-autonym="فارسی" data-language-local-name="波斯语" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Kaistanleveys" title="Kaistanleveys – 芬兰语" lang="fi" hreflang="fi" data-title="Kaistanleveys" data-language-autonym="Suomi" data-language-local-name="芬兰语" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Bande_passante" title="Bande passante – 法语" lang="fr" hreflang="fr" data-title="Bande passante" data-language-autonym="Français" data-language-local-name="法语" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Bandaleithead" title="Bandaleithead – 爱尔兰语" lang="ga" hreflang="ga" data-title="Bandaleithead" data-language-autonym="Gaeilge" data-language-local-name="爱尔兰语" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Ancho_de_banda" title="Ancho de banda – 加利西亚语" lang="gl" hreflang="gl" data-title="Ancho de banda" data-language-autonym="Galego" data-language-local-name="加利西亚语" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A8%D7%95%D7%97%D7%91_%D7%A1%D7%A8%D7%98" title="רוחב סרט – 希伯来语" lang="he" hreflang="he" data-title="רוחב סרט" data-language-autonym="עברית" data-language-local-name="希伯来语" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%AC%E0%A5%88%E0%A4%82%E0%A4%A1%E0%A4%B5%E0%A4%BF%E0%A4%A5" title="बैंडविथ – 印地语" lang="hi" hreflang="hi" data-title="बैंडविथ" data-language-autonym="हिन्दी" data-language-local-name="印地语" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/S%C3%A1vsz%C3%A9less%C3%A9g" title="Sávszélesség – 匈牙利语" lang="hu" hreflang="hu" data-title="Sávszélesség" data-language-autonym="Magyar" data-language-local-name="匈牙利语" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Lebar_pita" title="Lebar pita – 印度尼西亚语" lang="id" hreflang="id" data-title="Lebar pita" data-language-autonym="Bahasa Indonesia" data-language-local-name="印度尼西亚语" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Larghezza_di_banda" title="Larghezza di banda – 意大利语" lang="it" hreflang="it" data-title="Larghezza di banda" data-language-autonym="Italiano" data-language-local-name="意大利语" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%B8%AF%E5%9F%9F%E5%B9%85" title="帯域幅 – 日语" lang="ja" hreflang="ja" data-title="帯域幅" data-language-autonym="日本語" data-language-local-name="日语" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%8C%80%EC%97%AD%ED%8F%AD_(%EC%8B%A0%ED%98%B8_%EC%B2%98%EB%A6%AC)" title="대역폭 (신호 처리) – 韩语" lang="ko" hreflang="ko" data-title="대역폭 (신호 처리)" data-language-autonym="한국어" data-language-local-name="韩语" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Amplitudo_fasciae" title="Amplitudo fasciae – 拉丁语" lang="la" hreflang="la" data-title="Amplitudo fasciae" data-language-autonym="Latina" data-language-local-name="拉丁语" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Joslas_platums_(sign%C4%81lu_apstr%C4%81de)" title="Joslas platums (signālu apstrāde) – 拉脱维亚语" lang="lv" hreflang="lv" data-title="Joslas platums (signālu apstrāde)" data-language-autonym="Latviešu" data-language-local-name="拉脱维亚语" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%A8%D0%B8%D1%80%D0%B8%D0%BD%D0%B0_%D0%BD%D0%B0_%D1%87%D0%B5%D1%81%D1%82%D0%BE%D1%82%D0%B5%D0%BD_%D0%BE%D0%BF%D1%81%D0%B5%D0%B3" title="Ширина на честотен опсег – 马其顿语" lang="mk" hreflang="mk" data-title="Ширина на честотен опсег" data-language-autonym="Македонски" data-language-local-name="马其顿语" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Bandbreedte" title="Bandbreedte – 荷兰语" lang="nl" hreflang="nl" data-title="Bandbreedte" data-language-autonym="Nederlands" data-language-local-name="荷兰语" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Bandbreidde" title="Bandbreidde – 挪威尼诺斯克语" lang="nn" hreflang="nn" data-title="Bandbreidde" data-language-autonym="Norsk nynorsk" data-language-local-name="挪威尼诺斯克语" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/B%C3%A5ndbredde" title="Båndbredde – 书面挪威语" lang="nb" hreflang="nb" data-title="Båndbredde" data-language-autonym="Norsk bokmål" data-language-local-name="书面挪威语" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Pasmo_przenoszenia" title="Pasmo przenoszenia – 波兰语" lang="pl" hreflang="pl" data-title="Pasmo przenoszenia" data-language-autonym="Polski" data-language-local-name="波兰语" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Largura_de_banda" title="Largura de banda – 葡萄牙语" lang="pt" hreflang="pt" data-title="Largura de banda" data-language-autonym="Português" data-language-local-name="葡萄牙语" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9F%D0%BE%D0%BB%D0%BE%D1%81%D0%B0_%D0%BF%D1%80%D0%BE%D0%BF%D1%83%D1%81%D0%BA%D0%B0%D0%BD%D0%B8%D1%8F" title="Полоса пропускания – 俄语" lang="ru" hreflang="ru" data-title="Полоса пропускания" data-language-autonym="Русский" data-language-local-name="俄语" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/%C5%A0irina_frekventnog_opsega" title="Širina frekventnog opsega – 塞尔维亚-克罗地亚语" lang="sh" hreflang="sh" data-title="Širina frekventnog opsega" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="塞尔维亚-克罗地亚语" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Bandwidth_(signal_processing)" title="Bandwidth (signal processing) – Simple English" lang="en-simple" hreflang="en-simple" data-title="Bandwidth (signal processing)" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Pasovna_%C5%A1irina" title="Pasovna širina – 斯洛文尼亚语" lang="sl" hreflang="sl" data-title="Pasovna širina" data-language-autonym="Slovenščina" data-language-local-name="斯洛文尼亚语" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A8%D0%B8%D1%80%D0%B8%D0%BD%D0%B0_%D1%84%D1%80%D0%B5%D0%BA%D0%B2%D0%B5%D0%BD%D1%82%D0%BD%D0%BE%D0%B3_%D0%BE%D0%BF%D1%81%D0%B5%D0%B3%D0%B0" title="Ширина фреквентног опсега – 塞尔维亚语" lang="sr" hreflang="sr" data-title="Ширина фреквентног опсега" data-language-autonym="Српски / srpski" data-language-local-name="塞尔维亚语" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-su mw-list-item"><a href="https://su.wikipedia.org/wiki/Rubakpita" title="Rubakpita – 巽他语" lang="su" hreflang="su" data-title="Rubakpita" data-language-autonym="Sunda" data-language-local-name="巽他语" class="interlanguage-link-target"><span>Sunda</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Bandbredd" title="Bandbredd – 瑞典语" lang="sv" hreflang="sv" data-title="Bandbredd" data-language-autonym="Svenska" data-language-local-name="瑞典语" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Kipimo_data_(elektroniki)" title="Kipimo data (elektroniki) – 斯瓦希里语" lang="sw" hreflang="sw" data-title="Kipimo data (elektroniki)" data-language-autonym="Kiswahili" data-language-local-name="斯瓦希里语" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%AA%E0%AE%9F%E0%AF%8D%E0%AE%9F%E0%AF%88%E0%AE%AF%E0%AE%95%E0%AE%B2%E0%AE%AE%E0%AF%8D" title="பட்டையகலம் – 泰米尔语" lang="ta" hreflang="ta" data-title="பட்டையகலம்" data-language-autonym="தமிழ்" data-language-local-name="泰米尔语" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Bant_geni%C5%9Fli%C4%9Fi" title="Bant genişliği – 土耳其语" lang="tr" hreflang="tr" data-title="Bant genişliği" data-language-autonym="Türkçe" data-language-local-name="土耳其语" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A8%D0%B8%D1%80%D0%B8%D0%BD%D0%B0_%D1%81%D0%BC%D1%83%D0%B3%D0%B8_%D0%BF%D1%80%D0%BE%D0%BF%D1%83%D1%81%D0%BA%D0%B0%D0%BD%D0%BD%D1%8F" title="Ширина смуги пропускання – 乌克兰语" lang="uk" hreflang="uk" data-title="Ширина смуги пропускання" data-language-autonym="Українська" data-language-local-name="乌克兰语" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E9%A0%BB%E5%AF%AC" title="頻寬 – 粤语" lang="yue" hreflang="yue" data-title="頻寬" data-language-autonym="粵語" data-language-local-name="粤语" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q249998#sitelinks-wikipedia" title="编辑跨语言链接" class="wbc-editpage">编辑链接</a></span></div> </div> </div> </div> </header> <div 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title="链接到连接的数据仓库项目[g]" accesskey="g"><span>维基数据项目</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="页面工具"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="外观"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">外观</div> <button class="vector-pinnable-header-toggle-button 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td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox" style="margin: 0 0 1em 1em; float: right;"><tbody><tr><th colspan="2" class="infobox-above" style="background-color:;">「带宽」的各地常用名稱</th></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap; background-color:; width:4em;;">中国大陸</th><td class="infobox-data" style="white-space: nowrap; font-size: 1rem;;">带宽 </td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap; background-color:; width:4em;;">臺灣</th><td class="infobox-data" style="white-space: nowrap; font-size: 1rem;;">頻寬 </td></tr></tbody></table> <div role="note" class="hatnote navigation-not-searchable"><span typeof="mw:File"><a href="/wiki/Wikipedia:%E6%B6%88%E6%AD%A7%E4%B9%89" title="Wikipedia:消歧义"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fb/Confusion_grey.svg/24px-Confusion_grey.svg.png" decoding="async" width="24" height="18" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fb/Confusion_grey.svg/36px-Confusion_grey.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fb/Confusion_grey.svg/48px-Confusion_grey.svg.png 2x" data-file-width="260" data-file-height="200" /></a></span><style data-mw-deduplicate="TemplateStyles:r74069148">body:not(.skin-minerva) .mw-parser-output .ifmobile>.mobile{display:none}body.skin-minerva .mw-parser-output .ifmobile>.nomobile{display:inherit;display:initial}</style><span class="ifmobile"><span class="nomobile">  </span><span class="mobile"></span></span><b>提示</b>：此条目页的主题不是<b><a href="/wiki/%E5%AF%AC%E9%A0%BB" title="寬頻">寬頻</a></b>。</div> <p><b>带宽</b>（英語：<span lang="en"><b>Bandwidth</b></span>）指信号所占据的<a href="/wiki/%E9%A2%91%E5%B8%A6" class="mw-redirect" title="频带">频带</a>宽度；在被用来描述<a href="/wiki/%E4%BF%A1%E9%81%93" title="信道">信道</a>时，带宽是指能够有效通过该信道的信号的最大频带宽度。对于模拟信号而言，带寬又称为频寬，以<a href="/wiki/%E8%B5%AB%E5%85%B9" title="赫兹">赫兹</a>（Hz）为单位。例如模拟语音电话的信号带宽为3100Hz（从300Hz到3400Hz），一个PAL-D电视频道的带宽为8MHz（含保护带宽）。对于<a href="/wiki/%E6%95%B0%E5%AD%97%E4%BF%A1%E5%8F%B7" title="数字信号">数字信号</a>而言，带宽是指单位时间内链路能够通过的数据量。例如<a href="/wiki/%E7%B6%9C%E5%90%88%E6%A5%AD%E5%8B%99%E6%95%B8%E5%AD%97%E7%B6%B2" class="mw-redirect" title="綜合業務數字網">ISDN</a>的B信道带宽为64Kbps。由于数字信号的传输是通过模拟信号的调制完成的，为了与模拟带宽进行区分，数字信道的带宽一般直接用<a href="/wiki/%E6%B3%A2%E7%89%B9%E7%8E%87" title="波特率">波特率</a>或符号率来描述。 </p><p>带宽在<a href="/wiki/%E4%BF%A1%E6%81%AF%E8%AE%BA" title="信息论">信息论</a>、<a href="/wiki/%E6%97%A0%E7%BA%BF%E7%94%B5" title="无线电">无线电</a>、<a href="/wiki/%E9%80%9A%E4%BF%A1" title="通信">通信</a>、<a href="/wiki/%E4%BF%A1%E5%8F%B7%E5%A4%84%E7%90%86" title="信号处理">信号处理</a>和<a href="/wiki/%E6%B3%A2%E8%B0%B1%E5%AD%A6" class="mw-redirect" title="波谱学">波谱学</a>等领域都是一个核心概念。 </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="解释"><span id=".E8.A7.A3.E9.87.8A"></span>解释</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%E5%B8%A6%E5%AE%BD&action=edit&section=1" title="编辑章节：解释"><span>编辑</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>带宽在许多应用中都是一个关键的概念。例如在<a href="/wiki/%E6%97%A0%E7%BA%BF%E7%94%B5" title="无线电">无线电</a>通信中，带宽是<a href="/wiki/%E8%B0%83%E5%88%B6" class="mw-redirect" title="调制">调制</a><a href="/wiki/%E8%BD%BD%E6%B3%A2" title="载波">载波</a>占据的频率范围，然而在<a href="/wiki/%E5%85%89%E5%AD%A6" title="光学">光学</a>中带宽是单个<a href="/wiki/%E8%B0%B1%E7%BA%BF" class="mw-redirect" title="谱线">谱线</a>宽度或者整个<a href="/wiki/%E9%A2%91%E8%B0%B1" title="频谱">频谱</a>范围。 </p><p>对于不同的应用领域有不同的精确定义。例如，其中一个带宽定义就是超出范围的频率函数为零的频率范围。这就对应于数学概念中的函数，例如函数不是零的所有值的“长度”。 </p><p>另外一些定义可能没有那么严格，它们丢弃了频率函数“很小”的信号频率。很小可能是意味着它的值在最大值 3 <a href="/wiki/%E5%88%86%E8%B4%9D" class="mw-redirect" title="分贝">dB</a> 以下，也就是最大值的一半（<a href="/wiki/%E5%8D%8A%E8%83%BD%E9%BB%9E" title="半能點">半能點</a>）以下；也可能是小于某一个绝对值。由于函数的宽度有各种各样的定义，带宽的定义也就多种多样，分别用于不同的系统。 </p><p>根据<a href="/wiki/Shannon-Hartley_%E5%AE%9A%E7%90%86" class="mw-redirect" title="Shannon-Hartley 定理">Shannon-Hartley 定理</a>，可靠通信的数据速率直接与通信所用信号频率范围成比例。在这篇文章中，带宽一词有时用来表示数据速率，有时也表示通信系统的频率范围，有时同时表示两个概念。 </p><p>在心理学上，带宽就是心智的容量，包括两种能力，分别为认知能力和执行控制力。 </p> <div class="mw-heading mw-heading2"><h2 id="模拟系统"><span id=".E6.A8.A1.E6.8B.9F.E7.B3.BB.E7.BB.9F"></span>模拟系统</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%E5%B8%A6%E5%AE%BD&action=edit&section=2" title="编辑章节：模拟系统"><span>编辑</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-halign-right" typeof="mw:File"><a href="/wiki/File:Bandwidth.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f6/Bandwidth.svg/250px-Bandwidth.svg.png" decoding="async" width="250" height="176" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f6/Bandwidth.svg/375px-Bandwidth.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f6/Bandwidth.svg/500px-Bandwidth.svg.png 2x" data-file-width="542" data-file-height="381" /></a><figcaption></figcaption></figure> <p>对于在数学上可以看作时间函数的模拟信号来说，带宽是以<a href="/wiki/%E8%B5%AB%E5%85%B9" title="赫兹">赫兹</a>为单位、信号的<a href="/wiki/%E5%82%85%E9%87%8C%E5%8F%B6%E5%8F%98%E6%8D%A2" title="傅里叶变换">傅里叶变换</a>不为0的频率范围。这个定义也可以不严格地定义为在频域内信号的傅里叶变换功率在一个特定门限之上、例如与最大值差在 3dB 的范围之内的频率范围。信号带宽是信号随着时间波动速度的一个度量，这样，带宽越大，信号的变化越快。上面是信号带宽的描述，带宽也可以用于系统。在表示系统带宽的时候，系统带宽是系统<a href="/wiki/%E4%BC%A0%E9%80%92%E5%87%BD%E6%95%B0" title="传递函数">传递函数</a>带宽的简称。 </p><p>例如，函数的 3dB 带宽在图上表示是 <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle f_{2}-f_{1}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>f</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msub> <mo>−</mo> <msub> <mi>f</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>1</mn> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle f_{2}-f_{1}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/fbd2a47eac4cded324d3e641ac865e9c198d5b60" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:7.227ex; height:2.509ex;" alt="{\displaystyle f_{2}-f_{1}}"></span>，但是其它的带宽定义就会得到另外不同的结果。一个常用的数量是分数带宽（英語：<span lang="en">fractional bandwidth</span>，縮寫：FBW），它是除以设备中心频率得到的带宽。例如，一个带宽 2MHz、中心频率 10MHz 的设备的分数带宽是 2/10 或者表示为 20%。 </p><p><a href="/wiki/%E5%AE%9E%E6%95%B0" title="实数">实数</a><a href="/wiki/%E5%9F%BA%E5%B8%A6" title="基带">基带</a>系统既有负频率又有正频率这样一种现实可能使带宽变得易于混淆，因为有时带宽仅仅用来表示正的一半，例如偶尔可以看到这样的表示 <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle B=2W}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>B</mi> <mo>=</mo> <mn>2</mn> <mi>W</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle B=2W}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/5ab6bbe6ae192ea24a356446e5f5094502228d7e" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:8.46ex; height:2.176ex;" alt="{\displaystyle B=2W}"></span>，其中 <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle B}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>B</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle B}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/47136aad860d145f75f3eed3022df827cee94d7a" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.764ex; height:2.176ex;" alt="{\displaystyle B}"></span> 是总的带宽，<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle W}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>W</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle W}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/54a9c4c547f4d6111f81946cad242b18298d70b7" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.435ex; height:2.176ex;" alt="{\displaystyle W}"></span> 是正的带宽，如果需要为这个信号设计一个<a href="/wiki/%E4%BD%8E%E9%80%9A%E6%BB%A4%E6%B3%A2%E5%99%A8" title="低通滤波器">低通滤波器</a>，那么截止频率至少要保证 <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle W}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>W</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle W}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/54a9c4c547f4d6111f81946cad242b18298d70b7" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.435ex; height:2.176ex;" alt="{\displaystyle W}"></span> 不受影响。 </p><p><a href="/wiki/%E7%94%B5%E5%AD%90%E6%BB%A4%E6%B3%A2%E5%99%A8" title="电子滤波器">电子滤波器</a>带宽是频率响应在峰值<a href="/wiki/%E4%B8%AD%E5%BF%83%E9%A2%91%E7%8E%87" title="中心频率">中心频率</a>响应差在 3dB 范围内的频率部分。 </p><p>在<a href="/wiki/%E4%BF%A1%E5%8F%B7%E5%A4%84%E7%90%86" title="信号处理">信号处理</a>和<a href="/wiki/%E6%8E%A7%E5%88%B6%E7%90%86%E8%AE%BA" title="控制理论">控制理论</a>中，带宽是闭环控制系统增益衰减到 −3dB 的频率。 </p><p>在基础电路理论中带通和带阻滤波器的带宽表示频域中信号强度是最大信号强度 <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\frac {1}{\sqrt {2}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mn>1</mn> <msqrt> <mn>2</mn> </msqrt> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\frac {1}{\sqrt {2}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/db5f73af5805a28d23fa6782b4199ff31aa108ee" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.838ex; width:3.934ex; height:6.176ex;" alt="{\displaystyle {\frac {1}{\sqrt {2}}}}"></span> 的两个频率之间的距离。 </p><p>在<a href="/wiki/%E5%85%89%E5%AD%90%E5%AD%A6" title="光子学">光子学</a>中，带宽有不同的含义： </p> <ul><li>某些光源输出的带宽，例如ASE光源或者<a href="/wiki/%E6%BF%80%E5%85%89" title="激光">激光</a>；超短光脉冲的带宽可能非常宽广</li> <li><a href="/wiki/%E5%85%89%E7%BA%A4" class="mw-redirect" title="光纤">光纤</a>等一些元件能够传输的频率范围宽度</li> <li>光学放大器的增益带宽</li> <li>其它现象的范围（例如，<a href="/wiki/%E5%8F%8D%E5%B0%84" class="mw-disambig" title="反射">反射</a>、非线性过程的相位匹配、或者<a href="/wiki/%E8%B0%90%E6%8C%AF" class="mw-redirect" title="谐振">谐振</a>）</li> <li>光学调制器的最大调制频率或者调制频率范围</li> <li>一些测量仪器（如功率计）能够工作的频率范围</li> <li>光学通信系统能够达到的数据速率（例如 Gbit/s）</li></ul> <div class="mw-heading mw-heading2"><h2 id="數位系統"><span id=".E6.95.B8.E4.BD.8D.E7.B3.BB.E7.B5.B1"></span>數位系統</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%E5%B8%A6%E5%AE%BD&action=edit&section=3" title="编辑章节：數位系統"><span>编辑</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>在數位通訊系統中，頻寬有兩種含義。從技術意義上來說，它是<a href="/wiki/%E6%B3%A2%E7%89%B9%E7%8E%87" title="波特率">波特率</a>的俗稱，波特率是系統傳輸數據符號的速度；口語中它也用來表示<a href="/wiki/%E9%A0%BB%E9%81%93%E5%AE%B9%E9%87%8F" class="mw-redirect" title="頻道容量">頻道容量</a>，頻道容量是系統能夠傳輸數據的速度（參見Shannon Limit）。這樣，有32 條獨立數據線的66MHz <a href="/wiki/%E6%95%B8%E4%BD%8D" class="mw-redirect" title="數位">數位</a><a href="/wiki/%E5%8C%AF%E6%B5%81%E6%8E%92" class="mw-redirect mw-disambig" title="匯流排">匯流排</a>可以恰當地說成是66MHz 頻寬、2.1Gbit/s 的數據傳輸能力，但是對於匯流排“頻寬2.1Gbit/s”這樣一種說法這也不應感到奇怪。對於模擬的<a href="/wiki/%E6%95%B8%E6%93%9A%E6%A9%9F" class="mw-redirect" title="數據機">數據機</a>來說也有同樣的問題，對它來說，每個符號攜帶多位的訊息所以通過頻寬12kHz 的<a href="/wiki/%E9%9B%BB%E8%A9%B1%E7%B7%9A" title="電話線">電話線</a> 能夠傳輸56kbit/s 的訊息。 </p><p>在離散時間系統和<a href="/wiki/%E6%95%B8%E4%BD%8D%E8%A8%8A%E8%99%9F%E8%99%95%E7%90%86" class="mw-redirect" title="數位訊號處理">數位訊號處理</a>中，根據<a href="/wiki/%E6%8E%A1%E6%A8%A3%E5%AE%9A%E7%90%86" class="mw-redirect" title="採樣定理">Nyquist-Shannon 採樣定理</a>頻寬與<a href="/wiki/%E6%8E%A1%E6%A8%A3%E7%8E%87" class="mw-redirect" title="採樣率">採樣率</a>有關。 </p><p>頻寬也用於日常生活中用表示某些有限的或者花費金錢的東西。這樣，通信消耗頻寬，不合理地使用其它人的頻寬可以稱為频盗（bandwidth theft）。 </p> <div class="mw-heading mw-heading2"><h2 id="網路服務"><span id=".E7.B6.B2.E8.B7.AF.E6.9C.8D.E5.8B.99"></span>網路服務</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%E5%B8%A6%E5%AE%BD&action=edit&section=4" title="编辑章节：網路服務"><span>编辑</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>一些主机服务商会给带宽以不同的含义。在这里，带宽几乎变成一个單位時間內的流量概念。意思是單位時間內的下行数据总量。意味着如果一个公司提供每月2GB的带宽，意思就是用户每月最多只能下载2GB的内容。 </p> <div class="mw-heading mw-heading2"><h2 id="参见"><span id=".E5.8F.82.E8.A7.81"></span>参见</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%E5%B8%A6%E5%AE%BD&action=edit&section=5" title="编辑章节：参见"><span>编辑</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/%E9%A6%99%E5%86%9C%E5%AE%9A%E5%BE%8B" class="mw-redirect" title="香农定律">香农定律</a></li> <li><a href="/wiki/%E8%B0%83%E5%88%B6" class="mw-redirect" title="调制">调制</a></li> <li><a href="/wiki/%E6%B3%A2%E7%89%B9%E7%8E%87" title="波特率">波特率</a> - 符号率</li> <li><a href="/wiki/%E5%90%9E%E5%90%90%E9%87%8F" title="吞吐量">吞吐量</a></li> <li><a href="/wiki/%E5%B8%A6%E5%AE%BD_(%E8%AE%A1%E7%AE%97%E6%9C%BA)" title="带宽 (计算机)">带宽 (计算机)</a></li> <li><a href="/wiki/%E4%BC%BA%E6%9C%8D%E9%A0%BB%E5%AF%AC" title="伺服頻寬">伺服頻寬</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="外部链接"><span id=".E5.A4.96.E9.83.A8.E9.93.BE.E6.8E.A5"></span>外部链接</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%E5%B8%A6%E5%AE%BD&action=edit&section=6" title="编辑章节：外部链接"><span>编辑</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" 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