退流用英文怎么说

退流的英文：
abstraction

Please abstract the story of the book.
请写一下这本书的故事梗慨。

It's pure abstract reasoning.
这完全是理论推理。

There are two abstracts on the wall.
墙上挂着两幅抽象派画作。

A short, complete summary; an abstract.
概要；简编短且完全的概要；摘要

The idea of redness is an abstraction.
红色概念是一种抽象概念。