幸福取决于我们自己。

You know, in the Middle Ages, in England, when you met a very poor person, that person would be described as an "unfortunate" -- literally, somebody who had not been blessed by fortune, an unfortunate.

一个人为了保护自己的身体而做的事情，被视为合法行为。

The beauty of the Langlands program lies in its ability to reveal hidden connections.

你送给我桃子，我就回报给你李子。意思是做人要知恩图报，不能忘恩负义。也比喻礼尚往来，相互赠送礼物。

These walls are really interesting. At first you hate it, then you get used to it. After a considerable period of time, you will depend on it.