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》

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？

youdao

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。

youdao

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。

youdao