bird of passage
经过的人或暂时逗留的人
书面/口语·形容漂泊不定的人
英文释义
someone who stays in a place for only a short time and then moves on
例句
He's a bird of passage, always moving from one city to another for work.
典故来源
源自候鸟迁徙的习性，比喻像候鸟一样短暂停留某地后便离开的人。