Mathematics knows no races or geographic boundaries; for mathematics, the cultural world is one country.
数学不知道种族或地理边界;对于数学来说,文化世界是一个国家。
If you can imagine it, and believe it, you can achieve it.
生命是用来度过的,不是用来节省的。
如果你不改变自己,就会被别人改变。