We used to be very good friends.

我们过去曾是很要好的朋友。

youdao

If they can be recovered and used to have very good economic and social benefits.

如果能加以回收和利用，就具有很好经济效益和社会效益。

youdao

He used to be a very good athlete.

他曾是个非常优秀的运动员。

youdao

He used to be a very good athlete.

他曾是个非常优秀的运动员。

youdao