-Wiesler: You've done nothing, know nothing. So you think we just arrest innocent citizens on a whim?
arrest: 逮捕 innocent: 无罪的 citizen: 市民 on a whim: 心血来潮 whim: 一时的兴致
什么都没做?什么都不知道?你认为我们会随便逮捕无辜民众吗?
——《窃听风暴》

on a whim: 一时心血来潮

实例：

She bought that dress on a whim.她一时心血来潮就买了那件连衣裙。
　　
I bought the encyclopedia on a whim.我凭一时的兴致买了这本百科全书。

You would never go beyond the requirements on a whim , or just because you thought it was cool .你不可以因为一时兴起，或者仅仅是觉得很酷，就去超越需求。

He saw the deal on the Internet and booked the vacation on a whim.他在网上看到一个很划算的价格，心血来潮，马上定票，准备出去渡假。

He bought a lottery ticket on a whim and won the jackpot.他心血来潮买了张彩票，结果中了头奖。

The coach changed the game plan on a whim and won the championship. 教练突发奇想，立即决定改变原定战术，结果赢得了决赛胜利