at a canter
輕而易舉地解決問題，毫不費力地完成任務
口語·表示輕松完成某事
英文釋義
to do something with ease or without much effort or difficulty
例句
She passed the final exam at a canter, finishing an hour early.
典故來源
源自賽馬術語，指馬以慢跑（canter）的速度輕松獲勝，比喻不費力氣地完成某事。