cram up

• 死记硬背

cram up的用法和样例：

例句

1. He had to bone up on his French.
   他不得不死记硬背法文。
2. I have to cram for an English test tonight.
   今天晚上我得死记硬背准备英语考试。
3. George is boning up for an examination.
   乔治正为考试临时抱佛脚。
4. They have to stay up late cramming.
   他们得熬夜临时抱佛脚。