In the history of human, underground space has already developed in different levels, in particular, western developed countries have obtained better grade on developing underground public space.

在整个人类文明的历史中，对地下空间已经有不同程度的开发，特别是西方发达国家更是在地下公共空间开发上取得了较好成绩。

youdao

In the history of human, underground space has already developed in different levels, in particular, western developed countries have obtained better grade on developing underground public space.

在整个人类文明的历史中，对地下空间已经有不同程度的开发，特别是西方发达国家更是在地下公共空间开发上取得了较好成绩。

youdao