an open and shut case
显而易见的事情，没有争议的事情
口语·书面语·表示事情一目了然
英文释义
a situation or legal matter that is easily and clearly resolved or determined
例句
The police had his fingerprints on the gun — it's an open and shut case.
典故来源
源自法律术语，open表示明显，shut表示无需再讨论，指证据确凿的案件。