Markdown 简单介绍
[1]: http://google.com/ “Google”
[2]: http://search.yahoo.com/ “Yahoo Search”
[3]: http://search.msn.com/ “MSN Search”
[1]: http://google.com/ “Google”
[2]: http://search.yahoo.com/ “Yahoo Search”
[3]: http://search.msn.com/ “MSN Search”
[ny times]: http://www.nytimes.com/
[ny times]: http://www.nytimes.com/
[id]: /path/to/img.jpg “Title”
[id]: /path/to/img.jpg “Title”