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1·She said she wanted a dog but it was only a passing fancy.

她说想要一条狗，但这不过是一时心血来潮。《牛津词典》

2·Or is saving just a passing fancy?

还是这种储蓄的热潮只不过是昙花一现呢？

3·It was a passing fancy with a gorgeous cover.

我视它为一个带有精美封面的过往幻想。

4·Pretty Green is no passing fancy, he insists.

漂亮的绿没有心血来潮，他坚持。