"在家中备考"可以用"cramming for an exam at home"来表示。

"Cramming"是加强复习的意思，常常在考试前短时间内快速学习大量的内容。它来自于"cram"一词，有填满、塞满的意思，同时也有认真复习的意思。

例句：

I'm going to spend the weekend cramming for my history exam.
我要花一个周末认真复习历史考试。
I should have started studying earper instead of cramming at the last minute.
我应该早点开始学习，而不是在最后一分钟才匆忙复习。
I don't think cramming is a good way to prepare for an exam. It's better to spread out your studying over a longer period of time.
我不认为匆忙复习是准备考试的好方法。更好的方法是在较长的时间内分阶段学习。