公众在得到之前并不知道自己想要什么。
Every mathematical problem is a puzzle waiting to be solved, and every solution is a step towards greater understanding.
从我们记事起,妈妈就是一个中年妇女了,可谁又知道,她也曾是个花季少女。
Exile is not just a matter of geography; it is a state of mind.