在集合论中，包含关系具有自反性，因为任何集合都是其自身的子集。

In set theory, the inclusion relation shows ___reflexivity because any set is a subset of itself.

在团队项目中，反身性帮助我们不断审视和调整自己的工作方式。

In team projects, ___reflexivity helps us continuously examine and adjust our working methods.

语言的这种自反性特征使我们能够用语言本身来分析语言结构。

The ___reflexivity of language enables us to analyze linguistic structures using language itself.