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class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">移至侧栏</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">隐藏</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> <div id="mw-indicator-commons-icon" class="mw-indicator"><span typeof="mw:File"><a href="https://commons.wikimedia.org/wiki/File:Torus_cycles.png" title="commons:File:Torus cycles.png"><img alt="這個文件來自維基共享資源" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/14px-Commons-logo.svg.png" decoding="async" width="14" height="19" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/21px-Commons-logo.svg.png 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fullMedia" lang="zh" dir="ltr"><p><bdi dir="ltr"><a href="//upload.wikimedia.org/wikipedia/commons/5/54/Torus_cycles.png" class="internal" title="Torus cycles.png">Torus_cycles.png</a></bdi> <span class="fileInfo">（229 × 311像素，文件大小：40 KB，MIME类型：<span class="mime-type">image/png</span>）</span> </p></div><div class="sharedUploadNotice"> <p> <style data-mw-deduplicate="TemplateStyles:r83418294">.mw-parser-output .fmbox{clear:both;margin:0.2em 0;width:100%;border:1px solid var(--border-color-base,#a2a9b1);background-color:var(--background-color-interactive-subtle,#f8f9fa);box-sizing:border-box;color:var(--color-base,#202122)}.mw-parser-output .fmbox-system{background-color:var(--background-color-interactive-subtle,#f8f9fa)}.mw-parser-output .fmbox-warning{border:1px solid var(--border-color-destructive--active,#bb7070);background-color:var(--background-color-error-subtle,#ffdbdb)}.mw-parser-output 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font-size:smaller;">维基共享资源是一个储存自由版权作品的项目。您可以向此项目<a href="https://commons.wikimedia.org/wiki/Commons:Upload/zh" class="extiw" title="commons:Commons:Upload/zh">作出贡献</a>。</div></td></tr></tbody></table> </div> <hr style="clear:both; width:100%; color:#c00000; background-color:#c00000; height:3px; margin-top:0.4em;" /><div id="shared-image-desc"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="layouttemplate" style="clear:both;" dir="ltr"> <table style="width:100%; margin:0.5em auto; border-spacing:8px; background: var(--background-color-neutral-subtle,#f7fff8); color: inherit;border: 2px solid var(--border-color-progressive--focus,#55b480)"> <tbody><tr> <td><span typeof="mw:File"><a href="//commons.wikimedia.org/wiki/File:Gnome-x-office-drawing.svg" class="mw-file-description"><img src="https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Gnome-x-office-drawing.svg/70px-Gnome-x-office-drawing.svg.png" decoding="async" width="70" height="70" class="mw-file-element" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Gnome-x-office-drawing.svg/105px-Gnome-x-office-drawing.svg.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Gnome-x-office-drawing.svg/140px-Gnome-x-office-drawing.svg.png 2x" data-file-width="512" data-file-height="512"></a></span> </td> <td><div lang="zh-hans" dir="ltr" class="description zh-hans" style="display:inline;"><a href="//commons.wikimedia.org/wiki/File:Torus_cycles2.svg" title="File:Torus cycles2.svg">File:Torus cycles2.svg</a>是此文件的矢量版本。如果此文件质量不低于原点阵图，就应该将这个PNG格式文件替换为此文件。</div><div style="clear:both;"></div> <hr> <div style="margin-left:auto margin-right:auto; text-align:center; font-size:90%;">File:Torus cycles.png → <a href="//commons.wikimedia.org/wiki/File:Torus_cycles2.svg" title="File:Torus cycles2.svg">File:Torus cycles2.svg</a></div><span id="field-vva" title="Torus cycles2.svg"></span> <hr> <div style="font-size:90%;"><div lang="zh-hans" dir="ltr" class="description zh-hans" style="display:inline;">更多信息请参阅<a href="//commons.wikimedia.org/wiki/Help:SVG/zh" title="Help:SVG/zh">Help:SVG/zh</a>。</div></div> <hr> <div lang=""> <table class="mw-collapsible mw-collapsed skin-invert" style="clear:both;margin:2px auto;background:#FFF;color:#222;border:1px solid #AAA;padding:1px;width:100%"> <tbody><tr> <th scope="col" style="font-size:88%;background:#F0F2F5;border:none;color:#000;padding:0 .2em;text-align:center"><span style="font-weight:normal"><a href="//commons.wikimedia.org/wiki/Template:Vector_version_available/lang" title="Template:Vector version available/lang">其他语言</a></span> </th></tr> <tr> <td class="mw-collapsible-content" style="font-size:88%;border:none;padding:0;"><span style="font-size:small;line-height:1.4" class="plainlinks noprint"><a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/als"><bdi class="language lang-als" lang="als">Alemannisch</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/ar"><bdi class="language lang-ar" lang="ar">العربية</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/be-tarask"><bdi class="language lang-be-tarask" lang="be-tarask">беларуская (тарашкевіца)</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/bg"><bdi class="language lang-bg" lang="bg">български</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/bn"><bdi class="language lang-bn" lang="bn">বাংলা</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/ca"><bdi class="language lang-ca" lang="ca">català</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/ce"><bdi class="language lang-ce" lang="ce">нохчийн</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/cs"><bdi class="language lang-cs" lang="cs">čeština</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/da"><bdi class="language lang-da" lang="da">dansk</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/de"><bdi class="language lang-de" lang="de">Deutsch</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/el"><bdi class="language lang-el" lang="el">Ελληνικά</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/en"><bdi class="language lang-en" lang="en">English</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/en-gb"><bdi class="language lang-en-gb" lang="en-gb">British English</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/eo"><bdi class="language lang-eo" lang="eo">Esperanto</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/es"><bdi class="language lang-es" lang="es">español</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/et"><bdi class="language lang-et" lang="et">eesti</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/eu"><bdi class="language lang-eu" lang="eu">euskara</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/fa"><bdi class="language lang-fa" lang="fa">فارسی</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/fi"><bdi class="language lang-fi" lang="fi">suomi</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/fr"><bdi class="language lang-fr" lang="fr">français</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/fy"><bdi class="language lang-fy" lang="fy">Frysk</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/gl"><bdi class="language lang-gl" lang="gl">galego</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/gsw"><bdi class="language lang-gsw" lang="gsw">Alemannisch</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/he"><bdi class="language lang-he" lang="he">עברית</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/hr"><bdi class="language lang-hr" lang="hr">hrvatski</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/hu"><bdi class="language lang-hu" lang="hu">magyar</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/hy"><bdi class="language lang-hy" lang="hy">հայերեն</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/id"><bdi class="language lang-id" lang="id">Bahasa Indonesia</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/io"><bdi class="language lang-io" 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class="language lang-mk" lang="mk">македонски</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/ml"><bdi class="language lang-ml" lang="ml">മലയാളം</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/ms"><bdi class="language lang-ms" lang="ms">Bahasa Melayu</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/nb"><bdi class="language lang-nb" lang="nb">norsk bokmål</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/nds"><bdi class="language lang-nds" lang="nds">Plattdüütsch</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/nl"><bdi class="language lang-nl" lang="nl">Nederlands</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/nn"><bdi class="language lang-nn" lang="nn">norsk nynorsk</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/no"><bdi class="language lang-no" lang="no">norsk</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/oc"><bdi class="language lang-oc" lang="oc">occitan</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/pl"><bdi class="language lang-pl" lang="pl">polski</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/pt"><bdi class="language lang-pt" lang="pt">português</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/pt-br"><bdi class="language lang-pt-br" lang="pt-br">português do Brasil</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/ro"><bdi class="language lang-ro" lang="ro">română</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/ru"><bdi class="language lang-ru" lang="ru">русский</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/scn"><bdi class="language lang-scn" lang="scn">sicilianu</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/sco"><bdi class="language lang-sco" lang="sco">Scots</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/sk"><bdi class="language lang-sk" lang="sk">slovenčina</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/sl"><bdi class="language lang-sl" lang="sl">slovenščina</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/sr"><bdi class="language lang-sr" lang="sr">српски / srpski</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/sv"><bdi class="language lang-sv" lang="sv">svenska</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/ta"><bdi class="language lang-ta" lang="ta">தமிழ்</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/th"><bdi class="language lang-th" lang="th">ไทย</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/tr"><bdi class="language lang-tr" lang="tr">Türkçe</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/tt"><bdi class="language lang-tt" lang="tt">татарча / tatarça</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/uk"><bdi class="language lang-uk" lang="uk">українська</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/vec"><bdi class="language lang-vec" lang="vec">vèneto</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/vi"><bdi class="language lang-vi" lang="vi">Tiếng Việt</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/zh"><bdi class="language lang-zh" lang="zh">中文</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/zh-cn"><bdi class="language lang-zh-cn" lang="zh-cn">中文（中国大陆）</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/zh-hans"><bdi class="language lang-zh-hans" lang="zh-hans">中文（简体）</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/zh-hant"><bdi class="language lang-zh-hant" lang="zh-hant">中文（繁體）</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/zh-my"><bdi class="language lang-zh-my" lang="zh-my">中文（马来西亚）</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/zh-sg"><bdi class="language lang-zh-sg" lang="zh-sg">中文（新加坡）</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/zh-tw"><bdi class="language lang-zh-tw" lang="zh-tw">中文（臺灣）</bdi></a> <b>∙</b> <small class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/w/index.php?title=Template:Vector_version_available/lang&action=edit">+/−</a></small></span> </td></tr></tbody></table></div> </td> <td style="background:transparent; color: inherit;text-align:center; vertical-align:middle"><div class="wpImageAnnotatorControl wpImageAnnotatorOff"><div class="com-checker" style="display:inline-block;box-shadow: 1px 3px 5px #888;"><span typeof="mw:File"><a href="//commons.wikimedia.org/wiki/File:Torus_cycles2.svg" class="mw-file-description" title="新SVG图片"><img alt="新SVG图片" src="https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Torus_cycles2.svg/125px-Torus_cycles2.svg.png" decoding="async" width="125" height="150" class="mw-file-element" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Torus_cycles2.svg/188px-Torus_cycles2.svg.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Torus_cycles2.svg/250px-Torus_cycles2.svg.png 2x" data-file-width="512" data-file-height="614"></a></span></div></div> </td></tr></tbody></table> <p><span class="layouttemplateargs" style="display:none;speak:none;" title="template=Vector+version+available 1%3DTorus+cycles2.svg 2%3D 3%3D"> </span> </p> </div> <div class="layouttemplate" style="clear:both;" dir="ltr"> <table style="width:100%; margin:0.5em auto; border-spacing:8px; background: var(--background-color-neutral-subtle,#f7fff8); color: inherit;border: 2px solid var(--border-color-progressive--focus,#55b480)"> <tbody><tr> <td><span typeof="mw:File"><a href="//commons.wikimedia.org/wiki/File:Gnome-x-office-drawing.svg" class="mw-file-description"><img src="https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Gnome-x-office-drawing.svg/70px-Gnome-x-office-drawing.svg.png" decoding="async" width="70" height="70" class="mw-file-element" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Gnome-x-office-drawing.svg/105px-Gnome-x-office-drawing.svg.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Gnome-x-office-drawing.svg/140px-Gnome-x-office-drawing.svg.png 2x" data-file-width="512" data-file-height="512"></a></span> </td> <td><div lang="zh-hans" dir="ltr" class="description zh-hans" style="display:inline;"><a href="//commons.wikimedia.org/wiki/File:Torus_cycles.svg" title="File:Torus cycles.svg">File:Torus cycles.svg</a>是此文件的矢量版本。如果此文件质量不低于原点阵图，就应该将这个PNG格式文件替换为此文件。</div><div style="clear:both;"></div> <hr> <div style="margin-left:auto margin-right:auto; text-align:center; font-size:90%;">File:Torus cycles.png → <a href="//commons.wikimedia.org/wiki/File:Torus_cycles.svg" title="File:Torus cycles.svg">File:Torus cycles.svg</a></div><span id="field-vva" title="Torus cycles.svg"></span> <hr> <div style="font-size:90%;"><div lang="zh-hans" dir="ltr" class="description zh-hans" style="display:inline;">更多信息请参阅<a href="//commons.wikimedia.org/wiki/Help:SVG/zh" title="Help:SVG/zh">Help:SVG/zh</a>。</div></div> <hr> <div lang=""> <table class="mw-collapsible mw-collapsed skin-invert" style="clear:both;margin:2px auto;background:#FFF;color:#222;border:1px solid #AAA;padding:1px;width:100%"> <tbody><tr> <th scope="col" style="font-size:88%;background:#F0F2F5;border:none;color:#000;padding:0 .2em;text-align:center"><span style="font-weight:normal"><a href="//commons.wikimedia.org/wiki/Template:Vector_version_available/lang" title="Template:Vector version available/lang">其他语言</a></span> </th></tr> <tr> <td class="mw-collapsible-content" style="font-size:88%;border:none;padding:0;"><span style="font-size:small;line-height:1.4" class="plainlinks noprint"><a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/als"><bdi class="language lang-als" lang="als">Alemannisch</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/ar"><bdi class="language lang-ar" lang="ar">العربية</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/be-tarask"><bdi class="language lang-be-tarask" lang="be-tarask">беларуская (тарашкевіца)</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/bg"><bdi class="language lang-bg" lang="bg">български</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/bn"><bdi class="language lang-bn" lang="bn">বাংলা</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/ca"><bdi class="language lang-ca" lang="ca">català</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/ce"><bdi class="language lang-ce" lang="ce">нохчийн</bdi></a> <b>∙</b> <a class="external text" href="https://commons.wikimedia.org/wiki/Template:Vector_version_available/cs"><bdi 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href="/w/index.php?title=User:Rotatebot&action=edit&redlink=1" class="new mw-userlink" title="User:Rotatebot（页面不存在）"><bdi>Rotatebot</bdi></a></td><td dir="ltr">Bot: Image rotated by 270°</td></tr> <tr><td></td><td style="white-space: nowrap;"><a href="//upload.wikimedia.org/wikipedia/commons/archive/5/54/20120602034505%21Torus_cycles.png">2005年5月5日 (四) 08:00</a></td><td><a href="//upload.wikimedia.org/wikipedia/commons/archive/5/54/20120602034505%21Torus_cycles.png"><img alt="2005年5月5日 (四) 08:00版本的缩略图" src="//upload.wikimedia.org/wikipedia/commons/thumb/archive/5/54/20120602034505%21Torus_cycles.png/120px-Torus_cycles.png" decoding="async" loading="lazy" width="120" height="88" data-file-width="311" data-file-height="229" /></a></td><td>311 × 229<span style="white-space: nowrap;">（26 KB）</span></td><td><a href="/wiki/User:Berto" class="mw-userlink" title="User:Berto"><bdi>Berto</bdi></a></td><td dir="ltr">copied from the en wikipedia {{GFDL}}</td></tr> </table> </div> <h2 id="filelinks">文件用途</h2> <div id='mw-imagepage-section-linkstoimage'> <p>以下4个页面使用本文件： </p><ul class="mw-imagepage-linkstoimage"> <li class="mw-imagepage-linkstoimage-ns0"><a href="/wiki/%E5%90%8C%E8%AA%BF%E4%BB%A3%E6%95%B8" title="同調代數">同調代數</a></li> <li class="mw-imagepage-linkstoimage-ns0"><a href="/wiki/%E5%96%AE%E9%80%A3%E9%80%9A" title="單連通">單連通</a></li> <li class="mw-imagepage-linkstoimage-ns0"><a href="/wiki/%E5%BA%9E%E5%8A%A0%E8%8E%B1%E7%8C%9C%E6%83%B3" title="庞加莱猜想">庞加莱猜想</a></li> <li class="mw-imagepage-linkstoimage-ns0"><a href="/wiki/%E7%8E%AF%E9%9D%A2" title="环面">环面</a></li> </ul> </div> <h2 id="globalusage">全域文件用途</h2> <div id="mw-imagepage-section-globalusage"><p>以下其他wiki使用此文件： </p><ul> <li class='mw-gu-onwiki-ar_wikipedia_org'>ar.wikipedia.org上的用途 <ul> <li><a class="external" href="https://ar.wikipedia.org/wiki/%D9%82%D8%A7%D8%A6%D9%85%D8%A9_%D8%B9%D8%B2%D9%85_%D8%A7%D9%84%D9%82%D8%B5%D9%88%D8%B1_%D8%A7%D9%84%D8%B0%D8%A7%D8%AA%D9%8A">قائمة عزم القصور الذاتي</a></li> <li><a class="external" href="https://ar.wikipedia.org/wiki/%D9%86%D8%B8%D8%B1%D9%8A%D8%A9_%D8%A7%D9%84%D8%AA%D9%85%D8%A7%D8%AB%D9%84">نظرية التماثل</a></li> </ul></li> <li class='mw-gu-onwiki-az_wikipedia_org'>az.wikipedia.org上的用途 <ul> <li><a class="external" href="https://az.wikipedia.org/wiki/Tor_(h%C9%99nd%C9%99si_fiqur)">Tor (həndəsi fiqur)</a></li> </ul></li> <li class='mw-gu-onwiki-be_wikipedia_org'>be.wikipedia.org上的用途 <ul> <li><a class="external" href="https://be.wikipedia.org/wiki/%D0%A2%D0%BE%D1%80_(%D0%B3%D0%B5%D0%B0%D0%BC%D0%B5%D1%82%D1%80%D1%8B%D1%8F)">Тор (геаметрыя)</a></li> </ul></li> <li class='mw-gu-onwiki-ca_wikipedia_org'>ca.wikipedia.org上的用途 <ul> <li><a class="external" href="https://ca.wikipedia.org/wiki/Varietat_(matem%C3%A0tiques)">Varietat (matemàtiques)</a></li> <li><a class="external" href="https://ca.wikipedia.org/wiki/Usuari:Mzamora2/Laboratori">Usuari:Mzamora2/Laboratori</a></li> </ul></li> <li class='mw-gu-onwiki-co_wikipedia_org'>co.wikipedia.org上的用途 <ul> <li><a class="external" href="https://co.wikipedia.org/wiki/Toru_(giumitria)">Toru (giumitria)</a></li> </ul></li> <li class='mw-gu-onwiki-cs_wikipedia_org'>cs.wikipedia.org上的用途 <ul> <li><a class="external" href="https://cs.wikipedia.org/wiki/Fundament%C3%A1ln%C3%AD_grupa">Fundamentální grupa</a></li> <li><a class="external" href="https://cs.wikipedia.org/wiki/Jednodu%C5%A1e_souvisl%C3%A1_mno%C5%BEina">Jednoduše souvislá množina</a></li> </ul></li> <li class='mw-gu-onwiki-cv_wikipedia_org'>cv.wikipedia.org上的用途 <ul> <li><a class="external" href="https://cv.wikipedia.org/wiki/%D0%9F%C4%95%D1%80_%C3%A7%D1%8B%D1%85%C4%83%D0%BD%D1%83%D0%BB%D0%BB%C4%83_%D1%83%C3%A7%D0%BB%C4%83%D1%85">Пĕр çыхăнуллă уçлăх</a></li> <li><a class="external" href="https://cv.wikipedia.org/wiki/%D0%98%D0%BD%D0%B5%D1%80%D1%86%D0%B8_%D1%81%D0%B0%D0%BC%D0%B0%D0%BD%D1%87%C4%95%D0%BD_%D1%82%C4%95%D1%81%D0%BB%C4%95%D1%85%C4%95%D1%81%D0%B5%D0%BC">Инерци саманчĕн тĕслĕхĕсем</a></li> </ul></li> <li class='mw-gu-onwiki-da_wikipedia_org'>da.wikipedia.org上的用途 <ul> <li><a class="external" href="https://da.wikipedia.org/wiki/Torus">Torus</a></li> </ul></li> <li class='mw-gu-onwiki-de_wikipedia_org'>de.wikipedia.org上的用途 <ul> <li><a class="external" href="https://de.wikipedia.org/wiki/Benutzer_Diskussion:Metoc">Benutzer Diskussion:Metoc</a></li> </ul></li> <li class='mw-gu-onwiki-en_wikipedia_org'>en.wikipedia.org上的用途 <ul> <li><a class="external" href="https://en.wikipedia.org/wiki/Betti_number">Betti number</a></li> <li><a class="external" href="https://en.wikipedia.org/wiki/T-duality">T-duality</a></li> <li><a class="external" href="https://en.wikipedia.org/wiki/Simply_connected_space">Simply connected space</a></li> <li><a class="external" href="https://en.wikipedia.org/wiki/Portal:Mathematics/Featured_picture_archive">Portal:Mathematics/Featured picture archive</a></li> <li><a class="external" href="https://en.wikipedia.org/wiki/Rose_(topology)">Rose (topology)</a></li> <li><a class="external" href="https://en.wikipedia.org/wiki/User:Fropuff/Contributions">User:Fropuff/Contributions</a></li> <li><a class="external" href="https://en.wikipedia.org/wiki/User_talk:Aymatth2/Archive_2">User talk:Aymatth2/Archive 2</a></li> <li><a class="external" href="https://en.wikipedia.org/wiki/Wikipedia:Reference_desk/Archives/Mathematics/2010_July_31">Wikipedia:Reference desk/Archives/Mathematics/2010 July 31</a></li> <li><a class="external" href="https://en.wikipedia.org/wiki/User:J_kay831/Donut_Theory">User:J kay831/Donut Theory</a></li> <li><a class="external" href="https://en.wikipedia.org/wiki/Portal:Mathematics/Featured_picture/2012_09">Portal:Mathematics/Featured picture/2012 09</a></li> <li><a class="external" href="https://en.wikipedia.org/wiki/User:HOENIR">User:HOENIR</a></li> <li><a class="external" href="https://en.wikipedia.org/wiki/Talk:Tessellation/Archive_2">Talk:Tessellation/Archive 2</a></li> <li><a class="external" href="https://en.wikipedia.org/wiki/User:Omegalulz/sandbox">User:Omegalulz/sandbox</a></li> </ul></li> <li class='mw-gu-onwiki-eo_wikipedia_org'>eo.wikipedia.org上的用途 <ul> <li><a class="external" href="https://eo.wikipedia.org/wiki/Simple_koneksa_spaco">Simple koneksa spaco</a></li> </ul></li> <li class='mw-gu-onwiki-es_wikipedia_org'>es.wikipedia.org上的用途 <ul> <li><a class="external" href="https://es.wikipedia.org/wiki/Variedad_(matem%C3%A1ticas)">Variedad (matemáticas)</a></li> <li><a class="external" href="https://es.wikipedia.org/wiki/Toro_(geometr%C3%ADa)">Toro (geometría)</a></li> <li><a class="external" href="https://es.wikipedia.org/wiki/Conjunto_simplemente_conexo">Conjunto simplemente conexo</a></li> <li><a class="external" href="https://es.wikipedia.org/wiki/Grupo_de_homotop%C3%ADa">Grupo de homotopía</a></li> <li><a class="external" href="https://es.wikipedia.org/wiki/Rosa_(topolog%C3%ADa)">Rosa (topología)</a></li> </ul></li> <li class='mw-gu-onwiki-fa_wikipedia_org'>fa.wikipedia.org上的用途 <ul> <li><a class="external" href="https://fa.wikipedia.org/wiki/%DA%86%D9%86%D8%A8%D8%B1%D9%87">چنبره</a></li> </ul></li> <li class='mw-gu-onwiki-fi_wikipedia_org'>fi.wikipedia.org上的用途 <ul> <li><a class="external" href="https://fi.wikipedia.org/wiki/Yhdesti_yhten%C3%A4isyys">Yhdesti yhtenäisyys</a></li> </ul></li> <li class='mw-gu-onwiki-fr_wikipedia_org'>fr.wikipedia.org上的用途 <ul> <li><a class="external" href="https://fr.wikipedia.org/wiki/Courbe_elliptique">Courbe elliptique</a></li> <li><a class="external" href="https://fr.wikipedia.org/wiki/Vari%C3%A9t%C3%A9_(g%C3%A9om%C3%A9trie)">Variété (géométrie)</a></li> <li><a class="external" href="https://fr.wikipedia.org/wiki/Utilisateur:Jean-Luc_W/Brouillon">Utilisateur:Jean-Luc W/Brouillon</a></li> <li><a class="external" href="https://fr.wikipedia.org/wiki/Utilisateur:NIKO">Utilisateur:NIKO</a></li> <li><a class="external" href="https://fr.wikipedia.org/wiki/Mirage_topologique">Mirage topologique</a></li> <li><a class="external" href="https://fr.wikipedia.org/wiki/Jacques_Lacan">Jacques Lacan</a></li> <li><a class="external" href="https://fr.wikipedia.org/wiki/Nombre_de_Betti">Nombre de Betti</a></li> <li><a class="external" href="https://fr.wikipedia.org/wiki/Discussion:Jacques_Lacan/R%C3%A9am%C3%A9nagements">Discussion:Jacques Lacan/Réaménagements</a></li> </ul></li> <li class='mw-gu-onwiki-gl_wikipedia_org'>gl.wikipedia.org上的用途 <ul> <li><a class="external" href="https://gl.wikipedia.org/wiki/Conxectura_de_Poincar%C3%A9">Conxectura de Poincaré</a></li> </ul></li> <li class='mw-gu-onwiki-he_wikipedia_org'>he.wikipedia.org上的用途 <ul> <li><a class="external" href="https://he.wikipedia.org/wiki/%D7%9E%D7%A8%D7%97%D7%91_%D7%A4%D7%A9%D7%95%D7%98_%D7%A7%D7%A9%D7%A8">מרחב פשוט קשר</a></li> <li><a class="external" href="https://he.wikipedia.org/wiki/%D7%98%D7%95%D7%A8%D7%95%D7%A1">טורוס</a></li> <li><a class="external" href="https://he.wikipedia.org/wiki/%D7%A4%D7%95%D7%A8%D7%98%D7%9C:%D7%9E%D7%AA%D7%9E%D7%98%D7%99%D7%A7%D7%94/%D7%AA%D7%9E%D7%95%D7%A0%D7%94_%D7%A0%D7%91%D7%97%D7%A8%D7%AA/%D7%92%D7%9C%D7%A8%D7%99%D7%94">פורטל:מתמטיקה/תמונה נבחרת/גלריה</a></li> <li><a class="external" href="https://he.wikipedia.org/wiki/%D7%95%D7%99%D7%A7%D7%99%D7%A4%D7%93%D7%99%D7%94:%D7%9E%D7%95%D7%A2%D7%93%D7%95%D7%A0%D7%99%D7%9D/%D7%97%D7%91%D7%95%D7%A8%D7%AA_%D7%90%D7%95%D7%99%D7%9C%D7%A8/%D7%99%D7%91%D7%95%D7%90_%D7%AA%D7%9E%D7%95%D7%A0%D7%94_%D7%9E%D7%AA%D7%9E%D7%98%D7%99%D7%AA_%D7%9E%D7%94%D7%95%D7%99%D7%A7%D7%99_%D7%94%D7%90%D7%A0%D7%92%D7%9C%D7%99%D7%AA">ויקיפדיה:מועדונים/חבורת אוילר/יבוא תמונה מתמטית מהויקי האנגלית</a></li> <li><a class="external" href="https://he.wikipedia.org/wiki/%D7%A4%D7%95%D7%A8%D7%98%D7%9C:%D7%9E%D7%AA%D7%9E%D7%98%D7%99%D7%A7%D7%94/%D7%91%D7%93%D7%99%D7%A7%D7%95%D7%AA">פורטל:מתמטיקה/בדיקות</a></li> <li><a class="external" href="https://he.wikipedia.org/wiki/%D7%A4%D7%95%D7%A8%D7%98%D7%9C:%D7%9E%D7%AA%D7%9E%D7%98%D7%99%D7%A7%D7%94/%D7%AA%D7%9E%D7%95%D7%A0%D7%94_%D7%A0%D7%91%D7%97%D7%A8%D7%AA/21">פורטל:מתמטיקה/תמונה נבחרת/21</a></li> </ul></li> <li class='mw-gu-onwiki-hi_wikipedia_org'>hi.wikipedia.org上的用途 <ul> <li><a class="external" href="https://hi.wikipedia.org/wiki/%E0%A4%9C%E0%A4%A1%E0%A4%BC%E0%A4%A4%E0%A5%8D%E0%A4%B5%E0%A4%BE%E0%A4%98%E0%A5%82%E0%A4%B0%E0%A5%8D%E0%A4%A3%E0%A5%8B%E0%A4%82_%E0%A4%95%E0%A5%80_%E0%A4%B8%E0%A5%82%E0%A4%9A%E0%A5%80">जड़त्वाघूर्णों की सूची</a></li> </ul></li> </ul> <p>查看此文件的<a href="/wiki/Special:%E5%85%A8%E5%9F%9F%E4%BD%BF%E7%94%A8%E6%83%85%E5%86%B5/Torus_cycles.png" title="Special:全域使用情况/Torus cycles.png">更多全域用途</a>。 </p></div><h2 id="metadata">元数据</h2> <div class="mw-content-ltr mw-imagepage-section-metadata" lang="zh" dir="ltr"><p>此文件中包含有扩展的信息。这些信息可能是由数码相机或扫描仪在创建或数字化过程中所添加。 </p><p> 如果此文件的源文件已经被修改，一些信息在修改后的文件中将不能完全反映出来。</p><table id="mw_metadata" class="mw_metadata collapsed"> <tbody><tr class="exif-xresolution mw-metadata-collapsible"><th>水平分辨率</th><td>28.34 dpc</td></tr><tr class="exif-yresolution mw-metadata-collapsible"><th>垂直分辨率</th><td>28.34 dpc</td></tr></tbody></table> </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1&useformat=desktop" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">检索自“<a dir="ltr" href="https://zh.wikipedia.org/wiki/File:Torus_cycles.png">https://zh.wikipedia.org/wiki/File:Torus_cycles.png</a>”</div></div> <div id="catlinks" class="catlinks catlinks-allhidden" data-mw="interface"><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">隐藏分类：<ul><li><a href="/wiki/Category:%E5%9B%BE%E5%83%8F%E5%B0%BA%E5%AF%B8%E5%A4%A7%E5%B0%8F%E5%B8%A6%E6%9C%89%E9%A2%9D%E5%A4%96px%E5%AD%97%E7%AC%A6%E7%9A%84%E9%A1%B5%E9%9D%A2" title="Category:图像尺寸大小带有额外px字符的页面">图像尺寸大小带有额外px字符的页面</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> </ul> <ul id="footer-places"> <li id="footer-places-privacy"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy">隐私政策</a></li> <li id="footer-places-about"><a href="/wiki/Wikipedia:%E5%85%B3%E4%BA%8E">关于维基百科</a></li> <li id="footer-places-disclaimers"><a href="/wiki/Wikipedia:%E5%85%8D%E8%B4%A3%E5%A3%B0%E6%98%8E">免责声明</a></li> <li id="footer-places-wm-codeofconduct"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Universal_Code_of_Conduct">行为准则</a></li> <li id="footer-places-developers"><a href="https://developer.wikimedia.org">开发者</a></li> <li id="footer-places-statslink"><a href="https://stats.wikimedia.org/#/zh.wikipedia.org">统计</a></li> <li id="footer-places-cookiestatement"><a 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