我们必须净化环境。?。

We have to clean up the environment.

youdao

防治污染、净化环境是当今社会的重要课题。

Pollution control and environment cleaning become the most important task in contemporary society.

youdao

防治污染、净化环境是当今社会的重要课题。

Pollution control and environment cleaning become the most important task in contemporary society.

youdao