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。
英英解释
n.
1. an actor able to replace a regular performer when required
2. be an understudy or alternate for a role
