There's two--One technical distinction that people love to put on Intro Psych exams is that the difference between positive reinforcement and negative reinforcement.

心理学导论的考试中,会经常考到一个术语上的区别,即正强化,与负强化之间的区别。

耶鲁公开课 - 心理学导论课程节选

and any classes that interest me too. So I'm taking Intro-Sem, Intro Seminar class,

还有其他我感兴趣的课。所以我要选讲座课程，

斯坦福的新生 - SpeakingMax英语口语达人

In your Economics - in your Intro Economics class in 115 or 110, you saw some pretty good examples of situations that were not strategic.

在你们经济学基础课115或者110中,应该讲过一些不是策略形势的案例

耶鲁公开课 - 博弈论课程节选