on-stage

On stage, the actor adopts a fictitious persona.

舞台上,演员扮演虛构的人物。

The moment the clown appeared on stage, the audience folded up.

小丑一出现在舞台上, 观众们得前俯后仰。

The emcee came on stage and really whooped it up for the next act.

主持人上台来鼓动观众的情绪，为下一幕作足了铺埝。

Every actor ought to know his lines backwards before he goes on stage,as nervousness may make him forgetful.

所有演员在上台前都应当把台词记得滚瓜烂熟,因为一紧张就容易忘词。