相位裕度是系统在变得不稳定之前可以容忍的程度的度量。

我们把客户视为受邀参加派对的客人，而我们是主人。我们的工作是每天让客户体验的每一个重要方面都变得更好一点。

The strength of our industry lies in the people who dedicate their lives to it.

I do not believe in God… to the extent that theists have made their concept intelligible， they have given us no reason to think anything answers to it.

The most exciting part of acting is the discovery of the character, the exploration of their world.

煤炭工业是美国的支柱。