The state was an abstraction, but in the person of the czar it was a reality.

国家" 只是个抽象概念,但沙皇这个人是真实存在的

耶鲁公开课 - 欧洲文明课程节选

Or you could use the "is there" question to ask about the existence of something more abstract

另外，你也可以使用“Is there”问句来询问更为一些抽象的事情是否存在。

Is there 课堂 - SpeakingMax英语口语达人

So the number two, the numbers, three, whatever it is, whatever they are, are these Platonic abstract entities that don't exist in space and time.

因而,数字2,数字3,不管它们是什么,至少它们都是不存在于时空中的,柏拉图式的抽象实体

耶鲁公开课 - 死亡课程节选

There's no language in the world that you just cannot talk about abstract things with.

世界上并不存在,无法谈论抽象概念的语言

耶鲁公开课 - 心理学导论课程节选