a defining characteristic of people is the degree to which they are willing to break out of their

题目

a defining characteristic of people is the degree to which they are willing to break out of their
comfort zone这里的which是定语从句吗?句子的意思我知道,很这个用法我很费解,degree后面有to which.有没有高人分析一下这个句子的结构啊,

答案

因为degree的用法是to ... degree,而这个定语从句又是用来修饰degree,所以which前加了to