book it

• vt. 努力学习

book it的用法和样例：

例句

用作及物动词 (vt.)

1. It will be to his advantage if he studies hard.
   假如他努力学习，就会对他有利。
2. Why don't we double our efforts to learn it?
   我们为什么不加倍努力学习呢？