群落类型，作为一个阶级概念，无疑也是一种抽象。

A community-type, as a class-concept, is inescapably an abstraction .

youdao

群落类型，作为一个阶级概念，无疑也是一种抽象。

A community-type, as a class-concept, is inescapably an abstraction .

youdao