bone up 苦学，突击钻研

如果你 “bone up on something”，意思就是 “你深入研究一个话题，尽可能多地了解它”。人们可能会在考试或求职面试前 “bone up on something”。这是一个非正式短语。

例句

I need to bone up on chemistry before my exam next week.

我需要在下周的考试前苦攻一下化学。

I was nervous before the meeting, but I had boned up on all the important information, so it was OK.

开会前我很紧张，但我已经把所有重要的信息好好研究了一番，所以还好。

This text is important. Make sure you bone up on all that we've studied.

这篇课文很重要。一定要抓紧学习我们学过的所有内容。