a sudden strong and unreflective urge or desire to act
冲动
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I had an almost irresistible impulse to giggle 我有一种几乎难以抗拒的冲动,想要哈哈大笑
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[as modifier]
impulse buying .冲动购物。
[mass noun]the tendency to act in this way
冲动倾向
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he was a man of impulse, not premeditation .他是个易冲动的人,不事先多考虑。
a driving or motivating force; an impetus
推动力,冲力
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an added impulse to this process of renewal .对更新过程的又一推动力。
a pulse of electrical energy; a brief current
(电)脉冲
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nerve impulses 神经脉冲
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a spiral is used to convert radio waves into electrical impulses .一根螺线用来将无线电波转化成电脉冲。
【物理】 脉冲。
a change of momentum so produced, equivalent to the average value of the force multiplied by the time during which it acts
冲量。
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on impulse (或on an impulse ) suddenly and without forethought; impulsively 凭冲动,冲动地
"early 17th cent. (as a verb in the sense ‘give an impulse to’): the verb from Latin