> For the complete documentation index, see [llms.txt](https://overleaf-pro.ayaka.space/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://overleaf-pro.ayaka.space/latex/zh-tw/wen-yu-da/54-how-to-write-multi-lined-equations-using-the-align-environment.md).

# 如何使用 align 環境撰寫多行方程式

這是 21 部系列影片中的第 17 部，由 [Vincent Knight 博士](http://bit.ly/186ai3Z) 卡迪夫大學的。在大型方程式或跨越多行的推導中，我們可以使用 `\begin{align}` 和 `\end{align}` 命令來正確顯示對齊的數學式。這裡我們使用與號（`&`）命令，確保方程式始終如所需般對齊。我們也會看到如何使用 `\nonumber` 命令，在需要時將方程式中的中間步驟移除方程式編號。

{% embed url="<https://www.youtube.com/embed/AzFOqb9WKX4>" %}

影片中提供的範例也在此作為範本。要開始，請按一下這裡以 [開啟「對齊數學式」範例](https://www.overleaf.com/latex/examples/hello-world-example/vkbznvsdqjvm).


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