They decide that they will visit that park next Sunday.

问题描述:

They decide that they will visit that park next Sunday.

他们决定下星期六要去那个公园参观.为什么会出现2个they?主句的主语是they
宾语从句的主语也是they为什么会出现2个that?主从复合句中主句和从句都有自己的主语