Markdown is a way to style text on the web. You control the display of the document;formatting words as bold or italic,adding images,and creating lists are just a few of the things we can do with Markdown. Mostly,Markdown is just regular text with a few non-alphabetic characters thrown in,like # or *.
headers
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# thisis an <h1> tag
## thisis an <h2> tag
###### thisis an <h6> tag
lists
Unordered
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* Item 1
* Item 2
* Item 2a
* Item 2b
Ordered
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1. Item 1
2. Item 2
* Item 2a
* Item 2b
图片（Images）
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Format: 
重点（emphasis）
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* 这段文字将变成斜体 *
_ 这段文字也会变成斜体 _
** 这段文字将变成粗体 **
__ 这段文字也会变成粗体 __
链接（links）
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[GitHub Logo](/images/logo.png)
Format: [描述](url)
引用（blockquotes）
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Format: 
反斜杠 转义字符（backslash escapes）
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\*hello world\*
*hello world*
Markdown procides backslash escapes for the following characters: