什么人背后不被人说，又有谁在别人面前不去议论人呢？

A proof is a device for convincing someone else that a mathematical statement is true.

未来属于敢于梦想的人。

Every challenge is an opportunity in disguise.

大海不会奖赏那些太焦虑、太贪婪或太不耐烦的人。