kill two birds with one stone
一箭双雕
口语·表达一举两得
英文释义
to accomplish two tasks or objectives with a single effort or action
例句
By walking to work, I kill two birds with one stone: exercise and saving money.
典故来源
源自17世纪，原指用一块石头打中两只鸟，比喻一举两得。