今天我们要学的词是on a whim

On a whim意思是突发奇想，心血来潮。"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。"On a whim, he took the whole team out for ice cream," 他临时起意，带球队所有人去吃冰激凌。