Site is classified into three sorts: stable region, stable region in the main and non-stable region.

文中将场地分为三类：稳定区、基本稳定区和不稳定区。

youdao

Site is classified into three sorts: stable region, stable region in the main and non-stable region.

文中将场地分为三类：稳定区、基本稳定区和不稳定区。

youdao