Groundwater is not only the valuable natural resources, but also the basic element of environment.

地下水是一种宝贵的自然资源，同时又是环境的基本要素。

youdao

Groundwater is not only the valuable natural resources, but also the basic element of environment.

地下水是一种宝贵的自然资源，同时又是环境的基本要素。

youdao