If you are a musician trying to make it in Senegal, you may find success but you will find it hard to make a living.

VOA: standard.2009.08.27

Everyone knows from calculus that if you're trying to find a function about which you know only the derivative, you can always add a constant to one person's answer without changing anything.

学过微积分的人都知道,如果你想根据已知的导数,求出其原函数,你总是可以给某人的答案,随便加一个常数,且不影响结果

耶鲁公开课 - 基础物理课程节选

especially if you aren't trying to find a good bargain,

如果你不在意折扣的话，就更加适合，

旧金山的时尚达人 - SpeakingMax英语口语达人

But then I asked another question, do you think trying to pick mutual funds, trying to find a mutual fund that will beat the market is a smart thing to do or not a smart thing to do?

但是接着我又问了另一个问题,你们认为选择共同基金,选择一种强于市场表现的共同基金,是不是明智之举呢

耶鲁公开课 - 金融市场课程节选