The care of the environment is of prime importance.

　　保護環(huán)境是最重要的。

　　Quite rightly , the environment is of great concern.

　　當(dāng)然，環(huán)境問題人們極為關(guān)注。

　　It was interesting to be in a different environment.

　　換一換環(huán)境很有趣。