screw up their courage

• vi. 鼓足勇气

screw up their courage的用法和样例：

例句

用作不及物动词 (vi.)

1. He summoned up his courage and stepped in.
   他鼓足勇气走了进去。
2. And then you finally get up the courage to do it.
   然后你终于鼓足勇气去做。