For you cannot do so without friends and comrades you can trust.

因为你无法达到公正,如果你身边没有值得信赖的同僚与伙伴。

耶鲁公开课 - 政治哲学导论课程节选

Yeah, so maybe even among your roommates, maybe you don't need a contract because you can manage to achieve the same ends, by the fact that you're going to be interacting with the same person, over and over again during your time at Yale.

没错,就算你和室友没有书面协议,你们一样能达到预期的目的,因为在耶鲁大学上学期间,你们总要碰面

耶鲁公开课 - 博弈论课程节选

If you were asking questions, like, how high does it go, but you don't ask when does it go to the highest point, then you don't have to go through the whole process of finding the time at which it turned around.

如果你想问,例如,它可以到多高,不过你并没有问它何时达到最高点,那么你不用从头到尾再来一遍,来弄清质点何时转向

耶鲁公开课 - 基础物理课程节选