" Perhaps it is what the books call 'a passing fancy'" ?

“也许这就是书上所说的‘一时兴起’”？

Men are given to the trick of having a passing fancy for somebody else in the midst of a permanent love, which reasserts itself afterwards just as before.

男人在永久的爱中间，会有轻率之举，暂时迷恋上另一个女人。但那永久的爱随后又会如先前一样，重新获得它的地位。

He agreed to it, as he agreed later on to the leash, because he thought it was a passing fancy that could be overcome in time.

他同意了， 就像他后来同意皮带一样，因为他认为这是一种可以及时克服的幻想。

Mr. Starr was out of town, and would I talk to anyone else? I would not. I didn't even want to talk to Starr very badly, It was just a passing fancy. He was too far away to hit me.

斯塔尔先生不在城里，我能和其他人谈谈吗？我不会。我什至不想和斯塔尔说得很糟糕，那只是一时的幻想。他离得太远打不到我。