Merge pull request #155 from Frederick-S/master

Add JavaScript implementation for chapter02
The language of article 01.0.md was modified.
Part of the language of 02.0.md was modified.
update chapter 28
Merge pull request #157 from qiwsir/master

修改语言表述
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fix a bug

将line 75 if(m % n == 0)修改为if(m > n)
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Update 31.0.md
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