I never suffer from nerves when I'm speaking in public.我当众讲话从不紧张。
She was a bundle of nerves (= very nervous) before the audition.她试演之前非常紧张。
I always have a cigarette to calm/steady my nerves (= make me less nervous) before I go on stage.我在上台前总是抽支烟来稳定自己的情绪。