A：I'm terribly nervous.

我很紧张。

B：Calm down!

冷静下来!

注释：

a.nervous为形容词，表示“紧张的”，由名词nerve转变而成。

nerve可作“神经”解，是可数名词;也可表示“勇气”，此时则为不可数名词。

例：He doesn't have the nerve to pursue that girl.

= He doesn't have the guts to pursue that girl.

(他没有勇气追那女孩。)

* pursue vt.追求

b.想缓和对方情绪时，可说：

Calm down.

= Cool down./Cool off.

(冷静下来。)