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on impulse
on impulse 表示‘凭一时冲动’，常放在动词后，强调未经仔细思考。
She bought the dress on impulse.
她一时冲动买了那条裙子。
冲动；突发欲望；心血来潮
先理解核心含义，再看它在真实句子里的用法。
冲动；突发欲望；心血来潮
A strong urge or desire to act, especially a sudden one.
She bought the dress on impulse.
她一时冲动买了那条裙子。
指心理上的冲动，而非物理推力。
推力；推动；突然的驱动力。
A thrust; a push; a sudden force that impels.
本能动机
an instinctive motive
愿望或冲动,尤指突然促使行动的冲动。
A wish or urge, particularly a sudden one prompting action.
突发欲望
a sudden desire
On a sudden impulse, she bought a plane ticket to see her old friend.
她一时冲动买了张机票去看老朋友。
AI contextual example
He resisted the impulse to check his phone during the meeting.
他忍住开会时看手机的冲动。
AI contextual example
Learning to control your impulses is part of growing up.
学会控制自己的冲动是成长的一部分。
AI contextual example
profound religious impulses
深沉的宗教冲动
WordNet
on impulse 表示‘凭一时冲动’，常放在动词后，强调未经仔细思考。
She bought the dress on impulse.
她一时冲动买了那条裙子。
impulse 后接不定式，表示‘做某事的冲动’。
He felt a sudden impulse to laugh.
他突然感到一阵想笑的冲动。
常与 resist、control、suppress 等动词搭配，表示克制冲动。
She managed to resist the impulse to shout at him.
她设法忍住了对他大喊大叫的冲动。
impulse 作定语时表示‘一时冲动而做的’，常与 buy 或 purchase 连用。
The new policy discouraged impulse purchases.
新政策劝阻冲动购物。
Not this
I impulse to buy new shoes every time I see them.
Use this
I have an impulse to buy new shoes every time I see them.
汉语的“冲动”可作动词用，但英语 impulse 是名词，不能直接作谓语；要表达“有……的冲动”时需用 have an impulse to do something。
Not this
By impulse, she decided to quit her job.
Use this
On impulse, she decided to quit her job.
表示“一时冲动”时，英语使用固定介词搭配 on impulse，而非 by impulse；by 不能用于这个短语中。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
一时冲动
She bought the dress on impulse.
她一时冲动买了那条裙子。
冲动购物
Impulse buys often lead to regret.
冲动购物常常导致后悔。
冲动控制
Children need to learn impulse control.
孩子需要学会冲动控制。
创作冲动
The artist followed her creative impulse.
艺术家追随她的创作冲动。
电脉冲
Nerve cells transmit electrical impulses.
神经细胞传递电脉冲。
最初冲动
His initial impulse was to run away.
他最初的冲动是逃跑。
一时冲动
She bought the dress on impulse and later regretted it.
她一时冲动买了那条裙子，后来后悔了。
冲动购买
That expensive watch was an impulse buy he couldn't afford.
那块昂贵的手表是他负担不起的冲动购买。
冲动控制
Children often struggle with impulse control.
孩子们通常难以控制冲动。
Use impulse naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
想象“im”（进入）+“pulse”（脉搏），内心的脉搏突然加速，就是“冲动”。
该词作为名词时，常表示突然的欲望或冲动，多用于心理或日常语境；在神经科学中特指神经冲动。通常为中性，但根据上下文可能带有轻微的感情色彩。
Words like pulse, repulse, and convulse rhyme with impulse because their stressed vowel and following consonants match /ʌls/. Beware of lookalikes like advice /ədˈvaɪs/ or false /fɔːls/, which have different vowels.
Dictionary facts from ECDICT, WIKTIONARY.