表达 “face up to one's fears” 的意思是 “勇于面对自身的恐惧、克服困难”。通常是用来鼓励某人勇敢地面对一件让其感到害怕的事情。这里，也可以省略 “up to”，直接说 “face one's fears（面对某人的恐惧）”。

例句

Wang Na needs to face up to her fears and speak in public. She hates talking in front of rooms of people.

王娜必须克服恐惧，在公众面前演讲。她最讨厌在满屋子的人面前讲话。

I faced my fears when I got on that rollercoaster. I'm so scared of heights.

我坐上过山车之后不得不直面我的恐惧。我真的很恐高。

Look – just face up to your fears and ask him if he likes you!

听我说，别怕，鼓起勇气问他喜不喜欢你！