归根结底是 boil down to

1. 释义： to be the main reason for something or the most basic part of something 

2. 例句：

Big, sweeping life changes really boil down to small, everyday decisions.

巨大的生活改变其实归结于每天的小决定。

The question will always boil down to: who pays for the extra cost, and takes the initial risk? 

问题总会归结于：谁将支付超额的开支，承担最初的风险？

3. 造句：

这场争论归根结底是伦理问题而不是法律问题。

This dispute boils down to ethical rather than legal problems. 

学习归根结底是意愿而不是方法。

Study boils down to willingness rather than methods.