trouper

1. N-COUNT You can refer to an actor or other performer as a trouper, especially when you want to suggest that they have a lot of experience and can deal with difficult situations in a professional way. (尤指经验老到的)演员

Like the old trouper he is, he timed his entry to perfection. 像他这样的老演员，出场时间把握得恰到好处。