impulse

/ˈɪmpʌls/ n.
标准词条 CET-4 词根 pel
一句话记住

冲动;一时的强烈念头;冲力;推动力

释义与例句

n. 冲动;一时的强烈念头
a sudden strong wish to do something without thinking about the results
  1. She bought the dress on impulse, without checking the price.
    她一时冲动买下那条裙子,连价格都没看。
  2. He had a sudden impulse to phone his old teacher.
    他突然很想给以前的老师打个电话。
展开其余 1 条例句
  1. Don't act on impulse; think it over first.
    别凭冲动行事,先好好想想。
n. 冲力;推动力
a force that starts something moving or makes progress happen
  1. The impulse from the kick sent the ball rolling.
    踢出的冲力使球滚了起来。
  2. Her encouragement gave him the impulse to try again.
    她的鼓励给了他再试一次的动力。
展开其余 1 条例句
  1. The news gave a fresh impulse to public interest in science.
    这则消息进一步激发了公众对科学的兴趣。

词源与构词

记忆钩子 记 on impulse(一时冲动,也可说 on an impulse);resist the impulse to do(压住做某事的冲动);形容词‘冲动的’是 impulsive。

词族与关联词

同根词(同一个词根长出来的词)
  • compel 强迫;迫使
    The court compelled the company to release the documents. 法院强制该公司公开这些文件。
  • compulsory 强制的;必修的;义务的
    Attendance at the safety briefing is compulsory. 必须参加安全说明会。
词族(同一词根派生出的不同词性或形式)
  • impulsive (人、行为)易冲动的
    形容词,如 an impulsive decision(冲动的决定)。
易混词(形近或义近,注意区别)
  • on impulse 一时冲动(短语)
    on impulse 和 on an impulse 都地道:on impulse 更常见,on an impulse 强调‘某一次冲动’,如 On an impulse, she opened the letter。不能说 on the impulse 或 with impulse(×)。另外 impulse 是名词,‘冲动的’要用 impulsive:an impulsive decision ✓,an impulse decision(×)。
    I bought this hat on impulse and never wear it. 我一时冲动买了这顶帽子,却从来没戴过。
常见搭配
  • on impulse 一时冲动
    I bought this hat on impulse and never wear it. 我一时冲动买了这顶帽子,却从来没戴过。
  • an impulse to do something 做……的冲动
    He resisted the impulse to shout back. 他压住了想回喊的冲动。
  • act on impulse 凭冲动行事
    Teenagers often act on impulse rather than reason. 青少年常常凭冲动而不是理性行事。