n. 1.冲动；【物理学】冲量；推进力；脉冲，【医学】冲动，搏动。 2.鼓舞，刺激；一时高兴，兴奋。 短语和例子 a man of impulse感情用事的人。 act from impulse凭一时冲动行事。 be seized with a sudden impulse to do sth. 一时情不自禁地做某事。 feel an irresistible impulse觉得情不自禁。 give an impulse to 刺激，促进。 on the impulse of the moment 由一时高兴。 vt. 推动。
the act of applying force suddenly; "the impulse knocked him over" 同义词：impulsion, impetus,
an impelling force or strength; "the car''s momentum carried it off the road" 同义词：momentum,
the electrical discharge that travels along a nerve fiber; "they demonstrated the transmission of impulses from the cortex to the hypothalamus" 同义词：nerve impulse, nervous impulse, neural impulse,
(electronics) a sharp transient wave in the normal electrical state (or a series of such transients); "the pulsations seemed to be coming from a star" 同义词：pulsation, pulsing, pulse,
a sudden desire; "he bought it on an impulse" 同义词：caprice, whim,
an instinctive motive; "profound religious impulses" 同义词：urge,
例句与用法
1.
It was a day for impulse and truancy . 这是个适于冲动或偷懒的日子。
2.
We were seized by a sudden impulse to run . 我们身不由己突然想跑。
3.
The machine also sends a "start" impulse . 机器还发出“起动”脉冲信号。
4.
The derivative of the step is the impulse . 阶梯的导数就是脉冲。
5.
The impulse of falling water turns the waterwheel . 落水的冲力使水轮转动。
6.
I experienced a wild impulse to jest . 在一阵狂妄的冲动之下，我想捉弄别人。
7.
Nim controlled an impulse to snap back angrily . 尼姆压住了怒火，没有顶撞。
8.
An electrical impulse is sent to the exterior cells . 电脉冲被送到表层细胞。
9.
Beaverbrook was a potent impulse . 比费布鲁克是一位具有强大的推动力量的人物。
10.
He resisted the impulse to look behind him . 这回他极力忍住了，没有回过头去看。
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