the situation that an event happens in,or things which have happened in the past which affect it

题目

the situation that an event happens in,or things which have happened in the past which affect it
翻译.
特别是后半句.
第一个which指代的是things
那么第二个which呢
还有末尾的it呢?
这一句话其实是background的解释.

答案

第二个which就是指代那个things happened in the past
翻译就是 这个事件里的情况,或者过去发生的影响到这个情况的事情.