你必须学会自信地表现自己，才能被认真对待。

You have to learn to ___assert ___yourself in order to be taken seriously.

在外国，你可能需要自信地表现自己以适应环境。

In a foreign country, you might feel the need to ___assert ___yourself to fit in.

他终于自信地坚持自己，要求加薪。

He finally ___asserted ___himself and demanded a raise.