同学你好，该知识点来自沪江网校《英语零基础直达大学六级【随到随学班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
in that表示“因为”，引导原因状语从句，类似的用法比如
She was fortunate in that she had friends to help her. 她很幸运，有一些朋友帮助她。
The situation is rather complicated in that we have two managing directors. 由于我们有两位总经理，所以情况很复杂。

His request is unreasonable in that he knows we can't afford it.  
这里in that he knows we can't afford it是状语从句。

祝同学学习进步~