a piece of cake
非常容易完成的事情
口语·表示某事非常容易
英文释义
something that is very easy to do or accomplish
例句
Don't worry about the math test; it was a piece of cake for me.
典故来源
源自20世纪美国俚语，可能源于轻松吃蛋糕的意象，比喻任务简单易完成。