a flash in the pan
昙花一现
口语·形容昙花一现的人或事
英文释义
something or someone that initially shows great promise but fails to meet expectations in the long run
例句
His early success was just a flash in the pan; he never achieved anything else.
典故来源
源自早期火枪，火药在药池中闪光却未击发，比喻短暂的成功后无后续。