我们一时兴起，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，后来才发现并不符合预期。

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

他一时冲动订了机票，想给家人一个惊喜。

He booked the flight ___on ___the ___spur ___of ___the ___moment, wanting to surprise his family.