keep your chin up
保持乐观；振作起来
口语·安慰或鼓励
英文释义
to remain optimistic or cheerful in a difficult or challenging situation
例句
I know you failed the exam, but keep your chin up—you'll do better next time.
典故来源
源自19世纪拳击术语，指在比赛中保持头部高昂以避免被击倒，后引申为在困境中保持乐观。