on-stage

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

小丑一出现在上, 观众们个个笑得前俯仰。

On stage, the actor adopts a fictitious persona.

上,演员扮演虛构的物。

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

上来鼓动观众的情绪，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.

所有演员在上前都应当把词记得滚瓜烂熟,因为一紧张就容易忘词。