adv chiefly; primarily 主要地; 首要地
*You are mainly to blame. 主要应当责备你.
* The people in the streets were mainly tourists. 街上的人大多是游客.
used to mention the main part or cause of something, the main reason for something etc
Her illness was caused mainly by stress.
The workforce is mainly made up of women.
I don't go out much, mainly because I have to look after the kids.
Increased sales during the summer were mainly due to tourism.
We talked about various things - work, mainly.