To explain what they have seen,they build a theory about the way in which things happen and the caus

题目

To explain what they have seen,they build a theory about the way in which things happen and the causes and effects.帮我分析一下这句话.结构等.
but if ,like Hawing ,they are studing soming that is too large or too difficult to observe directly,they will use a model to test the theory.急用

答案

[To explain what they have seen](1),they build a theory (about the way 【in which things happen】(2) and 【the causes and effects.】(3))【主句】they build a theory其中：前面(1)目的状语,其中what they h...