英语长难句结构理解求助

题目

英语长难句结构理解求助
In this way ,we have learned all that we know of the law of astronomy ,or of the habit of the social insects,let us say.
这句话 是that we know 做定语修饰all 然后all of是搭配 在此句是分裂结构
还是that we know of the law of astronomy ,or of the habit of the social insectsz整体为定语修饰all
如何区分,求教资深英语高手

答案

all that 是等于what ,所以就是we have learned what we know/.,意思为我们已经学习到我们所了解的.