She’s more frugal than I am, and she’s great at checking my impulse to spend excessively just because I’m on the road.

她比我更节俭，她使我在检讨我的花费，发现是我在路上花费太多。

youdao

I telephoned her on impulse.

我一时冲动，给她打了电话。

youdao

And then, on an impulse, I tossed my long-sought prize into the clear, bright air and watched it float away like a perfect, living origami.

那时，我突然有种冲动，将自己长期以来苦苦追寻的战利品抛向了清澈晴朗的天空，看着它象完美的生动的千纸鹤一般飞远了。

youdao

Well, typically, I acted on impulse.

WSJ: Katherine Rosman on the Joys of Impulse Buying

However I understand the moral impulse of not wishing to pour salt on anyone's wounds, which stood behind the decision to write it.

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