a period of training spent in a hospital by a young doctor in order to finish their medical qualification

He served his internship at Garfield Hospital. 他在加菲尔德医院度过了实习期。

a period of time during which someone works for a company or organization in order to get experience of a particular type of work

Jane has a summer internship at a local TV station. 简暑期在当地一家电视台实习。