impulse
impulse
noun
on impulse (或 on an impulse)
noun
- a sudden strong and unreflective urge or desire to act
冲动
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。
[as modifier]impulse buying.
冲动购物。
■[mass noun]the tendency to act in this way
冲动倾向
he was a man of impulse, not premeditation.
他是个易冲动的人，不经事先考虑。 - a driving or motivating force; an impetus
推动力，冲力
an added impulse to this process of renewal.
附加在更新过程里的推动力。 - a pulse of electrical energy; a brief current
（电）脉冲
nerve impulses.
神经脉冲。
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。 - (Physics)a force acting briefly on a body and producing a finite change of momentum
(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
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 impuls- 'driven on', the noun from impulsus 'impulsion, outward pressure', both from the verb impellere (see impel)
考试词汇表
