大学英语六级常用短语 be engaged in doing
大学英语六级常用短语 be engaged in doing
释义：
be engaged in doing 忙于做某事 ; 忙于做
例句：
I'd be engaged in doing math.
钻研数学。
大学英语六级常用短语 be engaged in doing
释义：
be engaged in doing 忙于做某事 ; 忙于做
例句：
I'd be engaged in doing math.
钻研数学。