地点状语从句 Where+地点从句,（there）+主句
主句在从句后面时,there可用可不用；如果主句在从句的前面时,一般都不用there,是什么意思啊?
这里有两个列举
Where there is no rain, farming is difficult or impossible.在没有雨水的地方,耕作是困难的,或根本不可能的.
They were good persons. Where they went, there they were warmly welcomed. 他们都是好人.因此他们走到哪里都受到热烈欢迎
但还是不明白具体该怎么用