名詞 understudy:

1. an actor able to replace a regular performer when required
   同義詞：standby

動(dòng)詞 understudy:

1. be an understudy or alternate for a role
   同義詞：alternate

1. The leading man got laryngitis but his understudy stepped into the breach and gave an excellent performance.
   演主角的男演員得了喉炎，不過他的替角代替了他，而且表演得極為出色。
2. An understudy who filled in at the last minute.
   在最后一分鐘才臨時(shí)替補(bǔ)的演員
3. The understudy was substituted when the leading actor fell ill.
   主角演員患病，由替角代替演出。