When you don't have to worry about criteria like that ordinary, mechanical energy rules supreme, and that's dictating where equilibrium lies.

如果你不担心像这样的要求,通常的机械能就占据主要地位，并且决定平衡位于何处。

麻省理工公开课 - 热力学与动力学课程节选

I think if, you know, everyone sort of thinks about, I don't know, all being an entrepreneur. But if you're not,

我觉得，如果每个人都有做企业家的想法。
但是你如果不这样想，

要想成为事业家 - SpeakingMax英语口语达人

So if you could make a hepatitis B vaccine that didn't require a shot or that didn't require refrigeration, that would be a tremendous advance in spreading that vaccine through the world.

所以如果你可以开发出这样的乙肝疫苗,它不需注射就能接种,或者不需要冷藏,这样的巨大进步,能够将疫苗的使用普及至全世界

耶鲁公开课 - 生物医学工程探索课程节选

Suppose you are interested in investing in debt of companies, then you as an investor are subject to the problem that you might end up with the worst stuff if you don't watch out.

假设你有兴趣投资于公司债权,那么作为投资人你会面临这样一个问题,如果不谨慎,投资有可能会血本无归

耶鲁公开课 - 金融市场课程节选

because then you can solve new problems on midterms and what not if you understand the conceptual part.

因为这样你可以解决中期的新的问题，如果你不理解的话，就不好说了。

我的梦想是百万富翁 - SpeakingMax英语口语达人

If you don't, we may have to review your future with this company.

如果不这样的话，恐怕我们需要重新考虑你在公司的发展前景。

I'm afraid of 实战 - SpeakingMax英语口语达人

if you like baseball, even if you don't like baseball.

如果你喜欢棒球的话，但即使你不喜欢棒球也会这样。

布朗克斯的景点 - SpeakingMax英语口语达人