mainly

Her illness was caused mainly by stress.

她的病主要是由精神压力引起的。

The workforce is mainly made up of women.

员工主要是女性。

I don’t go out much, mainly because I have to look after the kids.

我不大出去，主要是因为我得照看孩子们。

Increased sales during the summer were mainly due to tourism.

夏季销售额增加主要是由旅游业带动的。

We talked about various things – work, mainly.

我们谈了各种各样的事情——主要是谈工作。