cram up

例句：

1. 1. She had tocram in all her work before thedeadline.
   她必须在截止日期前把所有工作都完成。
2. 2. He crammed for theexams and barely slept last night.
   他为了考试而熬夜，几乎没怎么睡觉。
3. 3. The students were cramming forthe upcoming test.
   学生们正在为即将到来的考试做准备。