| 单词 | impulse |
| 释义 | impulseimpulse /ˈɪmpʌls/ ●●○ noun 1[countable, uncountable] a sudden strong desire to do something without thinking about the results or whether it is sensible: an impulse to do something I had a strong impulse to laugh. Her first impulse was to run. Children with this disorder often act on impulse. You might want that cheesecake, but resist the impulse. Last-minute shopping results in impulse buying (=buying things without planning or choosing carefully).2[countable] science, physics a short electrical signal sent in one direction along a wire or nerve, or through the air3[countable] a reason, feeling, or aim that causes a particular kind of activity or behavior: The impulse of governments all over the world is to control information.4[countable] science, physics a measure of momentum that you get if you multiply the average value of a force by the length of time that the force acts |
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