世界历史可以这样总结：强国总行不义。等到他们醒悟了，他们不已经不再强了。

"The best performance improvement is the transition from the nonworking state to the working state."

An excellent man; he has no enemies; and none of his friends like him.

"The best novels are the ones that change you when you're not looking."

在数学中，就像在生活中一样，最深刻的发现往往来自于提出最简单的问题。