knuckled down

The exams are in a week, so isn't it time you knuckled down to your revision?

考试于两星期内进行，难道现在还不是你认真努力复习的时候吗？

chatted idly for a few moments then each knuckled down to work.

他们闲扯了一会儿，然后各自埋头工作。

To this sentence, Liu knuckled down to study half a year, and thus "see what the boys face the consequences. "

为了这句话，刘浩埋头苦读了半年时间，并由此“明白了什么叫做男孩子要勇于承担”。