betray

If he is nervous on stage, he does not betray it.

他即使在舞台上十分紧张，也不会表露出来。

She felt deeply hurt when she discovered that her best friend had agreed to betray her in order to gain a promotion at work.

当她发现自己最好的朋友同意背叛她为了在工作中升职时，她感到深受伤害。