as easy as pie
非常容易
口语·表示某事非常简单
英文释义
extremely easy or simple
例句
Don't worry about the test; it'll be as easy as pie if you studied.
典故来源
源自20世纪初的美国,馅饼是常见甜点,制作简单或吃起来轻松,因此用来比喻事情毫不费力。