dark horse
隐藏的才能或优点的人
口语·形容出人意料的竞争者或人才
英文释义
An unknown or unexpected winner or competitor
例句
No one expected her to win the election; she was a real dark horse.
典故来源
源自赛马术语，指赛前不为人知却意外获胜的马匹，后泛指隐藏实力者。