The people cultivate mainly rice and beans.
这里的人们主要种植稻子和豆类。
Police work is mainly routine.
警察的'工作主要都是按常规的。
The tanks were mainly constructed of steel plates.
这些坦克车主要是用钢板制造的。
The day should be mainly dry with sunny intervals.
白天大部分时间应无雨，间有阳光。
The target audience for this advertisement was mainly teenagers.
这个广告的对象主要是十几岁的青少年观众。