These are people--people with these payoffs are people who only care about their own grades.

有这样的动机的人,他们只在乎自己的成绩

耶鲁公开课 - 博弈论课程节选

I understand the motivation for people that say it's a good idea.

我理解那些说它是一个好主意的人的动机。

对于义务投票制 - SpeakingMax英语口语达人

Each of us individually has an incentive to emit carbons as usual.

通常我们每个人都有排碳的动机

耶鲁公开课 - 博弈论课程节选

Hobbes believed, on the other hand, that the overriding human fact, the overriding motivation of human behavior, is largely negative, not the desire to do good, but the desire to avoid some evil.

另一方面，霍布斯认为，人类最主要的行为，人行为的最主要的动机，在很大程度上是负面的，并不是为了做善良的事，只不过是为了避免罪恶的发生。

耶鲁公开课 - 政治哲学导论课程节选

How to gain, how to keep, how to recover happiness, is in fact for most men at all times the secret motive of all they do, and all they are willing to endure."

如何获得，如何保持，如何重获快乐，是多数人时刻怀有的秘密动机，是他们愿意忍受一切的目的“

哈佛公开课 - 幸福课课程节选