understudy meaning in English
vt.
1.【戏剧】练习做(临时替角)；临时代替(某演员)演出。
2.实地研习，实习(某工作)。
n.
1.垫角，临时替角，候补演员；〔美运〕后补队员。
2.候补人员；生力军。
Examples
- He is understudying the famous film star .
他在为那位著名影星充当替角。 - The leading player is ill. let his understudy to appear on the scene .
主角演员病了，让他的替角出场。 - Wait , wait , wait ! i ' m supposed to be the understudy now
等等！等等!我现在是替角才对 - The understudy was substituted when the leading actor fell ill
主角演员患病,由替角代替演出 - Here . this is harold ' s understudy . you can do whatever you want
这位.他是哈罗德的替身你想干嘛就干嘛