一时冲动之下，我们决定去伦敦玩一天。

___On ___the ___spur ___of ___the ___moment we decided to go to London for the day.

实际上，很多人一时冲动买东西，后来才发现它们并不符合他们的期望。

In reality, many people buy things ___on ___the ___spur ___of ___the ___moment only to discover later that they, in fact, do not meet their expectations.

他一时冲动预订了航班，没有咨询任何人。

He booked the flight ___on ___the ___spur ___of ___the ___moment without consulting anyone.