on impulse
idiom一时冲动；凭一时兴起
She bought the expensive coat on impulse.
她一时冲动买了那件昂贵的外套。
推动；激起
impulsing — present participle of impulse
先理解核心含义，再看它在真实句子里的用法。
推动；激起
To impel; to incite.
A strong argument can impulse an audience to reconsider its views.
一个有力的论点能够促使听众重新考虑自己的看法。
推动；激发。
To impel; to incite.
impulse
Base
原形
impulses
3rd person
第三人称单数
impulsing
-ing
现在分词
impulsed
Past
过去式
impulsed
Past participle
过去分词
The documentary impulses viewers to question their choices.
这部纪录片促使观众质疑自己的选择。
The discovery impulsed a wave of new research.
这一发现推动了一波新的研究。
Her courage has impulsed many young people to pursue their dreams.
她的勇气激励了许多年轻人追求梦想。
impulse 作动词时指给予推动力、激发行动，常用于正式或书面语，比名词用法少见。
Her inspiring story impulsed many young people to start volunteering.
她鼓舞人心的故事促使许多年轻人开始做志愿服务。
Frequent praise impulses a child to keep trying.
频繁的表扬促使孩子继续努力。
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一时冲动；凭一时兴起
She bought the expensive coat on impulse.
她一时冲动买了那件昂贵的外套。
冲动购买；心血来潮买下的东西
That new gadget was an impulse buy; I didn't really need it.
那个新玩意儿是冲动购买，我其实并不需要它。
凭冲动行事
He acted on an impulse and quit his job.
他一时冲动辞了职。
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记忆联想：impulse 拆成 im + pulse（脉搏），像脉搏一股向前的冲劲推动你行动，即“推动、激发”。
语域：formal 常见场景：formal writing、literary texts 作为动词，impulse 表示“推动；激发”，属于正式或书面用语，多用于文学作品或正式论述中；日常会话中比较少用。
No common English word rhymes exactly with /ˈɪmpəls/ because the stress falls on the first syllable and the final syllable is unstressed. The spelling lookalikes pulse (/pʌls/), repulse (/rɪˈpʌls/), and convulse (/kənˈvʌls/) all have the stressed vowel /ʌ/ and are pronounced differently from impulse.
Dictionary facts from ECDICT, WIKTIONARY.