on a whim
She decided to fly to Paris on a whim.
她一时冲动决定飞往巴黎。
一时的兴致；怪念头；冲动
一时兴起或突然改变主意。；一种鸟,即欧亚赤颈鸭。；由马力或蒸汽动力驱动的大型绞盘或立式滚筒,用于从矿井提升矿石或水等。
a sudden desire or an odd, fanciful idea
一时兴起或突然改变主意。
A fanciful impulse, or sudden change of idea.
一种鸟,即欧亚赤颈鸭。
A bird, the Eurasian wigeon.
由马力或蒸汽动力驱动的大型绞盘或立式滚筒,用于从矿井提升矿石或水等。
A large capstan or vertical drum turned by horse power or steam power, for raising ore or water, etc., from mines, or for other purposes.
She bought the expensive dress on a whim, without even trying it on.
她一时冲动买下了那条昂贵的裙子，甚至没有试穿。
用法提示：whim作名词，表示一时的冲动或兴致。
On a whim, they decided to take a road trip to the coast.
一时兴起，他们决定开车去海边旅行。
用法提示：whim作名词，表示突然的念头。
He painted the room purple on a whim, but ended up loving it.
他一时心血来潮把房间刷成了紫色，但最后却很喜欢。
用法提示：whim作名词，表示怪念头或突发奇想。
She decided to fly to Paris on a whim.
她一时冲动决定飞往巴黎。
常表达受制于某人的随意决定。
The schedule is always at the whim of the boss.
时间表总是由老板一时兴起决定。
I had a sudden whim to buy a motorcycle.
我突然心血来潮想买一辆摩托车。
与whim互换时，caprice强调变化无常，语气稍正式
impulse强调内在驱动力，比whim更强调不可抗拒
fancy偏重喜爱之情，whim更偏重随意性
notion含义较广，whim更强调短暂和没有理由
vagary较正式，常指异常或离奇的想法
grammar · medium
易错句子He whimmed to buy a new car.
正确表达He had a whim to buy a new car.
whim是名词，不是动词，应使用‘have a whim’或‘on a whim’表示一时冲动。
grammar · medium
易错句子She is a very whim girl.
正确表达She is a very whimsical girl.
whim是名词，其形容词形式是whimsical，表示‘异想天开的’。
whim 指一时的冲动或怪念头，强调突然性；whimsy 指古怪、滑稽或异想天开的特质，常指一种风格或品质。
whim 指突然的欲望或想法，可能无害；caprice 强调毫无理由的反复无常，常带贬义或指任性。
一时兴起
She decided to dye her hair blue on a whim.
她一时兴起决定把头发染成蓝色。
随意地
The manager changed the schedule at whim, confusing everyone.
经理随意更改时间表，把大家都弄糊涂了。
突如其来的怪念头
He bought a house in the countryside on a sudden whim.
他一时冲动在乡下买了栋房子。
命运的捉弄
By a whim of fate, they met again years later.
由于命运的捉弄，他们在多年后又相遇了。
时尚的突发潮流
Designers often follow the whim of fashion rather than functionality.
设计师们常常追随时尚的突发潮流，而非功能性。
心情变化常引发一时兴起的行为
与whim同属一时冲动，强调突发性
突然的欲望可导致一时兴起的决定
自发的行为常出于一时兴起
一时的念头是whim的常见来源
一时兴起
She bought the dress on a whim.
她一时兴起买了那条裙子。
随心所欲地
He changes his mind at whim.
他随心所欲地改变主意。
命运的捉弄
They met by a whim of fate.
他们因命运的捉弄而相遇。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.