任何一个学术框架都不能只有两个对立的基本概念，至少要有三个。

Within any academic frame, that are at least three basic opposite concepts instead of two.

youdao

任何一个学术框架都不能只有两个对立的基本概念，至少要有三个。

Within any academic frame, that are at least three basic opposite concepts instead of two.

youdao