understudy的名词是：understudies。understudy的英英释义是Noun:an actor able to replace a regular performer when required。understudy的意思是v.充当（某角色的）候补演员；n.候补演员。
一、英英释义点此查看understudy的详细内容
二、词典解释
1.预备演员；替角儿
An actor's or actress'sunderstudy is the person who has learned their part in a play and can act the part if the actor or actress is ill.
understudy的反义词
e.g. He was anunderstudy to Charlie Chaplin on a tour of the USA.
他是查理·卓别麟美国巡演期间的替角儿。
三、例句
The understudy was substituted when the leading actor fell ill.
主角演员患病，由替角代替演出。
When the star became sick,his understudy stepped into his part.
当这位电影明星生病时，由他的候补演员担任他的角色。
She got the part and I was her understudy.
她得到了这个角色，我只能作为替补的临时演员。
四、经典引文
An opening for a man or woman to understudy the present Manager.
出自：Daily Telegraphunderstudy的相关近义词
lieutenant、standby、substitute、cover、stand-in、replacement、double、deputy、alternate
understudy的相关临近词
underpan、under、undertaking situation、underrate and despise、under developed region、underwriting agreement、under reduced pressure、under the principle of、underdepreciated value、under the patronage of