flash in the pan
昙花一现（没有长久效果或持久影响的事物）
口语·形容昙花一现
英文释义
Something that initially shows great promise or potential, but ultimately fails to deliver or live up to expectations
例句
His singing career was just a flash in the pan; he never made another hit.
典故来源
源自18世纪火枪术语，火药池中的火药闪光（flash）却未引燃子弹（pan），比喻短暂成功无后续。