and he started with the position that you ought to cut taxes but only where you can find offsetting cuts and government spending.

最开始，他的观点是,减税是正道,但必须先想到如何补偿这部分损失,如何削减财政支出。

斯坦福公开课 - 经济学课程节选

But the only way you're going to find out is when you actually deal with the problem.

但是只有你动手去解题,才是验证自己会与不会的唯一方法

耶鲁公开课 - 基础物理课程节选

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

That's the only time you're going to find out.

只有这个时候你才知道自己是否真正理解了

耶鲁公开课 - 基础物理课程节选

You're only given the particle has acceleration a, and you are asked to find out what is x?

你只知道质点的加速度为a,你需要求出x是多少

耶鲁公开课 - 基础物理课程节选