Markdown 语法

1> Text that is a quote

1Use `git status` to list all new or modified files that haven't yet been committed.

1Some basic Git commands are:
2```
3git status
4git add
5git commit
6```

1```
2Look! You can see my backticks.
3```

1This site was built using [GitHub Pages](https://pages.github.com/).

1![Screenshot of a comment on a GitHub issue showing an image, added in the Markdown, of an Octocat smiling and raising a tentacle.](https://myoctocat.com/assets/images/base-octocat.svg)

1- George Washington
2- John Adams
3- Thomas Jefferson

11. James Madison
22. James Monroe
33. John Quincy Adams

1- [x] #739
2- [ ] https://github.com/octo-org/octo-repo/issues/740
3- [ ] Add delight to the experience when all tasks are complete :tada:

1- [ ] \(Optional) Open a followup issue

1Here is a simple footnote[^1].  
2A footnote can also have multiple lines[^2].  
3
4[^1]: My reference.  
5[^2]: To add line breaks within a footnote, prefix new lines with 2 spaces.
6  This is a second line.  

 1> [!NOTE]
 2> Useful information that users should know, even when skimming content.
 3
 4> [!TIP]
 5> Helpful advice for doing things better or more easily.
 6
 7> [!IMPORTANT]
 8> Key information users need to know to achieve their goal.
 9
10> [!WARNING]
11> Urgent info that needs immediate user attention to avoid problems.
12
13> [!CAUTION]
14> Advises about risks or negative outcomes of certain actions.

1| Command | Description |
2| --- | --- |
3| git status | List all new or modified files |
4| git diff | Show file differences that haven't been staged |

1| Command | Description |
2| --- | --- |
3| `git status` | List all *new or modified* files |
4| `git diff` | Show file differences that **haven't been** staged |

1| Left-aligned | Center-aligned | Right-aligned |
2| :---         |     :---:      |          ---: |
3| git status   | git status     | git status    |
4| git diff     | git diff       | git diff      |

1| Name     | Character |
2| ---      | ---       |
3| Backtick | `         |
4| Pipe     | \|        |

 1<details>
 2
 3<summary>Tips for collapsed sections</summary>
 4
 5### You can add a header
 6
 7You can add text within a collapsed section. 
 8
 9You can add an image or a code block, too.
10
11```ruby
12   puts "Hello World"
13```
14
15</details>

1```mermaid
2graph TD;
3    A-->B;
4    A-->C;
5    B-->D;
6    C-->D;
7```

1graph TD;
2    A-->B;
3    A-->C;
4    B-->D;
5    C-->D;

1This sentence uses `$` delimiters to show math inline:  $\sqrt{3x-1}+(1+x)^2$

1$$\left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)$$

1<font face="黑体">我是黑体字</font>
2<font face="微软雅黑">我是微软雅黑</font>
3<font face="STCAIYUN">我是华文彩云</font>
4<font color=red>我是红色</font>
5<font color=#008000>我是绿色</font>
6<font color=Blue>我是蓝色</font>
7<font size=5>我是尺寸</font>
8<font face="黑体" color=green size=5>我是黑体，绿色，尺寸为5</font>

1| 类别<div style="width:100px"> | 含义 | 行为 |
2|------------------------------|-----|-----|
3| 独奏环境 | 声音不是必不可少的，但它会使其他音频静音。例如，有配乐的游戏。 | 响应静音开关。 不与其他声音混合。 在后台不播放。  |
4| 周围 | 声音不是必不可少的，它不会使其他音频静音。例如，一个让人们在玩游戏时播放其他应用程序中的音乐来代替游戏原声的游戏。 | 响应静音开关。 与其他声音混合。 在后台不播放。 |
5| 回放 | 声音是必不可少的，并且可能与其他音频混合。例如，教外语的有声读物或教育应用，人们在离开应用后可能想听。| 不响应静音开关。 可能会或可能不会与其他声音混合。 可以在后台播放。 |
6| 记录 | 声音被记录下来。例如，提供音频录制模式的笔记应用程序。如果此类应用允许人们播放已记录的笔记，则可能会将其类别切换为播放。 | 不响应静音开关。 不与其他声音混合。 可以在后台录制。 |
7| 播放并录制 | 可能会同时录制和播放声音。例如，音频消息传递或视频通话应用程序。 | 不响应静音开关。 可能会或可能不会与其他声音混合。 可以在后台录制和播放。 |