My nephew and classmate Satya managed to screw up courage enough to volunteer to mention this to my father.

我的侄子兼同学，萨提亚，鼓起勇气，自告奋勇地去跟我父亲提这事。

It is therefore important that you screw up your courage when courage is needed.

因此重要的是在需要勇气时鼓起自己的勇气。

You must screw up your courage.

你必须鼓起勇气。

It has taken a long time to screw up the courage.

人们花费了大量的时间方才提振起勇气。

No matter how uncomfortable it may seem, but you should screw up your courage to have an unpleasant conversation and stand your ground.

似乎无论多么不舒服，但是你应该鼓起勇气进行一次不愉快的谈话，坚守阵地。