过眼云烟的英文：
as transient and ephemeral as a fleeting cloud
参考例句：
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That haunting episode of bygone days was to her mother but a passing accident.
那件日夜盘据在她心头的住事，对于她母亲不过是一件过眼云烟的偶然事件罢了。
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But also a warning against overrating the passing glories of wealth, power and great good fortune.
这句话同时也警示我们，财富、权力或鸿运当头的荣耀，都不过是过眼云烟，我们不必太放在心上。
transient是什么意思：
a.【正式】
1.暂短的；转瞬即逝的；倏忽
2.暂住的；过往的；临时的
n.【美】暂住某地的人；过往旅客；临时工
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step function transient response
阶跃函数瞬态特性
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We are just the transients at the hotel.
我们只是旅馆里的过往旅客。
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Transient area is a storage area used for transient programs of routines.
暂驻存储区是用来临时存放暂态程序或例行程序的一种储区。
ephemeral是什么意思：
adj. 短暂的；朝生暮死的
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It is not something ephemeral.
它不是朝生暮死的东西。
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Her success as a singer was ephemeral.
作为歌唱家她取得的成功只是昙花一现。
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Such novels came forward to enjoy ephemeral popularity only.
这样的小说只是昙花一现的东西而已。
fleeting是什么意思：
adj. 稍纵即逝的，短暂的
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That is a fleet horse.
那是一匹快马。
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This is a vain and fleeting thing.
这是一种空虚的、转瞬即逝的东西。
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The world is like a fleeting show.
人世如白驹过隙。
