Now if you look at my derivation here, there's one spot where I could have just stopped and proven my point without going through the whole thing.

如果仔细检查我的推导过程，你会发现其实,我们不用研究整个循环过程,就可以证明我们要证的公式。

麻省理工公开课 - 热力学与动力学课程节选

I stopped at the stoplight and there was a homeless guy there, a beggar,

我停下车等红灯，然后看到一个无家可归的人在那里乞讨，

不做善事的理由 - SpeakingMax英语口语达人