be boiled down to

楼上的概念对了， 不过用法好像不是很正确
this chapter can be 〔summarized in 〕a few sentences 会比较通吧。

boiled down to 通常指问题
the problem is boiled down to whether he can come today．
＝＞ 问题的〔核心／重点〕在于他今天可以赶来吗。

be boiled down to被煮成了什么

例如：The maple sap was boiled down to a thick syrup.

槭树汁被煮成糖浆。

This chapter can be boiled down to a few sentences.这一章可以用几句话来概括。