Cách sử dụng
An understudy is a person who learns the role of someone else in case that person is unable to perform. This is commonly used in the context of theater or film, where a backup actor or actress is trained in case the main star becomes sick or is unable to perform. It can also be used in other contexts where someone is trained to take over for another person in certain situations. For example, a new employee might be trained to be an understudy for a more experienced worker in case the experienced worker leaves the company or goes on vacation.