首行缩进

一个汉字占两个空格大小，所以使用四个空格就可以达到首行缩进两个汉字的效果。有如下几种方法：
1.一个空格大小的表示： 或 ，此时只要在相应需要缩进的段落前加上 4个 如上的标记即可，注意要带上分号。
2.两个空格的大小表示： 或 ，同理，使用2个即可缩进2个汉字，推荐使用该方式。
3.不换行空格： 或 ，使用4个 即可。

公式

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$$y_t = \tau_t + \zeta_t$$

$$y_t = \tau_t + \zeta_t$$

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$$\min_{\\{ \tau_{t}\\} }\sum_{t}^{T}\zeta_{t}^{2}+\lambda\sum_{t=1}^{T}\left[\left(\tau_{t}-\tau_{t-1}\right)-\left(\tau_{t-1}-\tau_{t-2}\right)\right]^{2}$$

$$\min_{\{ \tau_{t}\} }\sum_{t}^{T}\zeta_{t}^{2}+\lambda\sum_{t=1}^{T}\left[\left(\tau_{t}-\tau_{t-1}\right)-\left(\tau_{t-1}-\tau_{t-2}\right)\right]^{2}$$

标题

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# H1
## H2
### H3
#### H4
##### H5
###### H6

Alternatively, for H1 and H2, an underline-ish style:

Alt-H1
======

Alt-H2
------

H1

H2

H3

H4

H5
H6

Alternatively, for H1 and H2, an underline-ish style:

Alt-H1

Alt-H2

强调

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Emphasis, aka italics, with *asterisks* or _underscores_.

Strong emphasis, aka bold, with **asterisks** or __underscores__.

Combined emphasis with **asterisks and _underscores_**.

Strikethrough uses two tildes. ~~Scratch this.~~

Emphasis, aka italics, with asterisks or underscores.

Strong emphasis, aka bold, with asterisks or underscores.

Combined emphasis with asterisks and underscores.

Strikethrough uses two tildes. Scratch this.

列表

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1. First ordered list item
2. Another item
  * Unordered sub-list.
1. Actual numbers don't matter, just that it's a number
  1. Ordered sub-list
4. And another item.

   You can have properly indented paragraphs within list items. Notice the blank line above, and the leading spaces (at least one, but we'll use three here to also align the raw Markdown).

   To have a line break without a paragraph, you will need to use two trailing spaces.  
   Note that this line is separate, but within the same paragraph.  
   (This is contrary to the typical GFM line break behaviour, where trailing spaces are not required.)

* Unordered list can use asterisks
- Or minuses
+ Or pluses
- Paragraph In unordered list

  For example like this.

Common Paragraph with some text.
And more text.
  1. First ordered list item
  2. Another item
  • Unordered sub-list.

  1. Actual numbers don't matter, just that it's a number

  2. Ordered sub-list

  3. And another item.

    You can have properly indented paragraphs within list items. Notice the blank line above, and the leading spaces (at least one, but we'll use three here to also align the raw Markdown).

    To have a line break without a paragraph, you will need to use two trailing spaces.
    Note that this line is separate, but within the same paragraph.
    (This is contrary to the typical GFM line break behaviour, where trailing spaces are not required.)

  • Unordered list can use asterisks
  • Or minuses
  • Or pluses

  • Paragraph In unordered list

    For example like this.

Common Paragraph with some text.
And more text.

嵌入 HTML

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<p>To reboot your computer, press <kbd>ctrl</kbd>+<kbd>alt</kbd>+<kbd>del</kbd>.</p>

To reboot your computer, press ctrl+alt+del.

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<dl>
    <dt>Definition list</dt>
    <dd>Is something people use sometimes.</dd>

    <dt>Markdown in HTML</dt>
    <dd>Does *not* work **very** well. Use HTML <em>tags</em>.</dd>
</dl>
Definition list
Is something people use sometimes.
<dt>Markdown in HTML</dt>
<dd>Does *not* work **very** well. Use HTML <em>tags</em>.</dd>

表

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|                |ASCII                          |HTML                         |
|----------------|-------------------------------|-----------------------------|
|Single backticks|`'Isn't this fun?'`            |'Isn't this fun?'            |
|Quotes          |`"Isn't this fun?"`            |"Isn't this fun?"            |
|Dashes          |`-- is en-dash, --- is em-dash`|-- is en-dash, --- is em-dash|
ASCII HTML
Single backticks 'Isn't this fun?' 'Isn't this fun?'
Quotes "Isn't this fun?" "Isn't this fun?"
Dashes -- is en-dash, --- is em-dash -- is en-dash, --- is em-dash

Colons can be used to align columns.

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| Tables        | Are           | Cool  |
| ------------- |:-------------:| -----:|
| col 3 is      | right-aligned |  |
| col 2 is      | centered      |    |
| zebra stripes | are neat      |
Tables Are Cool
col 3 is right-aligned
col 2 is centered
zebra stripes are neat

The outer pipes (|) are optional, and you don't need to make the raw Markdown line up prettily. You can also use inline Markdown.

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Markdown | Less | Pretty
--- | --- | ---
*Still* | `renders` | **nicely**
1 | 2 | 3
Markdown Less Pretty
Still renders nicely
1 2 3

You can find more information about LaTeX mathematical expressions here.

引用

Blockquotes are very handy in email to emulate reply text.
This line is part of the same quote.

Quote break.

This is a very long line that will still be quoted properly when it wraps. Oh boy let's keep writing to make sure this is long enough to actually wrap for everyone. Oh, you can put Markdown into a blockquote.

水平线

Three or more...

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---

Hyphens

***

Asterisks

___

Underscores

Hyphens

Asterisks

Underscores

分割线

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Here's a line for us to start with.

This line is separated from the one above by two newlines, so it will be a *separate paragraph*.

This line is also a separate paragraph, but...
This line is only separated by a single newline, so it's a separate line in the *same paragraph*.

Here's a line for us to start with.

This line is separated from the one above by two newlines, so it will be a separate paragraph.

This line is also a separate paragraph, but...
This line is only separated by a single newline, so it's a separate line in the same paragraph.

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This is a regular paragraph.

<table>
    <tr>
        <td>Foo</td>
    </tr>
</table>

This is another regular paragraph.

This is a regular paragraph.

Foo

This is another regular paragraph.

链接

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[I'm an inline-style link](https://www.google.com)

[I'm an inline-style link with title](https://www.google.com "Google's Homepage")

[I'm a reference-style link][Arbitrary case-insensitive reference text]

[I'm a relative reference to a repository file](../blob/master/LICENSE)

[You can use numbers for reference-style link definitions][1]

Or leave it empty and use the [link text itself]

Some text to show that the reference links can follow later.

[arbitrary case-insensitive reference text]: https://hexo.io
[1]: https://hexo.io/docs/
[link text itself]: https://hexo.io/api/

I'm an inline-style link

I'm an inline-style link with title

I'm a reference-style link

I'm a relative reference to a repository file

You can use numbers for reference-style link definitions

Or leave it empty and use the link text itself

Some text to show that the reference links can follow later.

图片

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hover to see the title text:

Inline-style:

![alt text](https://hexo.io/icon/favicon-196x196.png "Logo Title Text 1")

Reference-style:
![alt text][logo]

[logo]: https://hexo.io/icon/favicon-196x196.png "Logo Title Text 2"

hover to see the title text:

Inline-style:

alt text

Reference-style:
alt text

视频

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<a href="https://www.youtube.com/watch?feature=player_embedded&v=ARted4RniaU
" target="_blank"><img src="https://img.youtube.com/vi/ARted4RniaU/0.jpg"
alt="IMAGE ALT TEXT HERE" width="240" height="180" border="10" /></a>

Pure markdown version:

[![IMAGE ALT TEXT HERE](https://img.youtube.com/vi/ARted4RniaU/0.jpg)](https://www.youtube.com/watch?v=ARted4RniaU)

IMAGE ALT TEXT HERE

Pure markdown version:

IMAGE ALT TEXT HERE

代码和语法高亮

Inline code has back-ticks around it.

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var s = "JavaScript syntax highlighting";
alert(s);
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s = "Python syntax highlighting"
print s
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No language indicated, so no syntax highlighting.
But let's throw in a <b>tag</b>.

This post is originated from here and is used for testing markdown style. This post contains nearly every markdown usage. Make sure all the markdown elements below show up correctly.