in that是一种固定搭配，其意为“因为”，与for the reason that,because同义，可用于引导原因状语从句。如：
I'm in a slightly awkward position in that he's not arriving until the 10th.我的处境有点尴尬，因为他要到10号才来。
Most of them are not in reality engineers,in that the work they do is mostly clerical.他们中的大多数人实际上都不是工程师，因为他们做的主要是办公室工作。
I am an optimist in that I believe that human beings do not always perversely try to make life worse for themselves.我是乐天派的人，因为我认为人类并非总是违反常情地力图使自己的生活变差。