understudy
['ʌndə,stʌdi]
n. 候补演员；替工
vt. 练习代演；当…的替手；实地演习
vi. 学当替工
同义词
参考例子
1.He is understudying Hamlet.
他正在练习演“哈姆雷特”以便临时代替别人。
2.If one area has dysfunction or damage, another can step in like an understudy and play the role.
要是一个区域失去功能或受损，另一个就会上场，取而代之，就像是替补演员。
3.Reina feels his situation with the Spanish national team is similar to that of his Anfield understudy Diego Cavalieri.
雷纳认为目前他在国家队的处境与卡瓦雷利在安菲尔德替补角色相似。
英文解释
n.
1.an actor able to replace a regular performer when required
2.be an understudy or alternate for a role
网络释义
understudy
预备演员; 练习做临时替角; 替角; 充当替手;
Understudy assignment
实习,见习; 接替安排; 实习，见习;
understudy system
实习制度;