Some critics say that Pop Art was a reaction to Abstract Expressionism.

VOA: special.2010.09.05

This is not just some abstract thing going on in a class in Yale.

这不仅仅是耶鲁课堂上的抽象概念

耶鲁公开课 - 博弈论课程节选

Now, a lot of today is going to be fairly abstract, so I just want to remind you that Game Theory has some real world relevance.

今天所讲的很多内容会很抽象,但我想要提醒大家,博弈论与现实世界是紧密联系的

耶鲁公开课 - 博弈论课程节选

I'm thinking of the general problem of the abstraction of virtue, an abstract notion of virtue. Think of all the questions that all of us at some point or other tend to associate with virtue.

我在思考贞操这个抽象概念，贞操这一抽象的概念，想想所有那些,我们时不时的会由贞操想到的问题。

耶鲁公开课 - 弥尔顿课程节选