I think we must do something to protect the environment.

我认为我们必须做些什么来保护环境。

youdao

So I think we must do something to protect the environment.

因此我们必须做些事情来保护我们的环境。

youdao

So I think we must do something to protect the environment.

因此我们必须做些事情来保护我们的环境。

youdao