in that可以引导的原因状语从句，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。
in that 作为连词的用法
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.
in that与in which的意思和用法辨析
in that，意为“既然、因为”，引导原因状语从句，用法相当于because
例如：Criticism and self-criticism is necessary in that it helps us correct our mistakes.
批评与自我批评是必要的，因为它可以帮助我们纠正错误。
in which，为介词加关系代词，引导定语从句。
例如：A final consideration is the environment in which we live and work.
最后一项要考虑的是人们的生活与工作环境。