a flash in the pan .



昙花一现，转瞬即逝，多用来形容某事"持续时间短"。



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flash指"闪光"，pan指"旧式枪的火药池"。a flash in the pan指"火药在药池点燃后所发出的闪光"，一般用来形容某事"持续时间极短暂"。比如：

He used to be called a young entrepreneur. But soon he was forgotten by the public. He was a flash in the pan.

他曾被誉为青年企业家。但不久就被公众所遗忘。他真是昙花一现啊。

Don't count him in. You know him. His determination is always a flash in the pan.

别把他算进去。你还不了解他吗。他的决心持续不了三分钟。



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