impulse

英 [ˈɪmpʌls]

美 [ˈɪmpʌls]

n.  冲动; 心血来潮; 一时的念头; 脉冲; 冲击; 冲量; 推动力; 刺激

复数：impulses　

CET6考研TOEFLIELTSGRETEM8

Collins.2 / BNC.5362 / COCA.4695

牛津词典

noun

• 冲动；心血来潮；一时的念头
  a sudden strong wish or need to do sth, without stopping to think about the results
  1. He had a sudden impulse to stand up and sing.
     他突然心血来潮，想站起来歌唱。
  2. I resisted the impulse to laugh.
     我强忍着没有笑出来。
  3. Her first impulse was to run away.
     她的第一个念头就是逃走。
  4. The door was open and on (an) impulse she went inside.
     门开着，她一时心血来潮就走了进去。
  5. He tends to act on impulse .
     他往往凭一时冲动行事。
• 脉冲；冲击；冲量
  a force or movement of energy that causes sth else to react
  1. nerve/electrical impulses
     神经冲动；电路脉冲
• 推动力；刺激
  something that causes sb/sth to do sth or to develop and make progress
  1. to give an impulse to the struggling car industry
     给予挣扎中的汽车工业一点刺激

柯林斯词典

• N-VAR 冲动;一时兴起的念头
  Animpulseis a sudden desire to do something.
  1. Unable to resist the impulse, he glanced at the sea again...
     他抑制不住冲动,又向海面瞥了一眼。
  2. He still couldn't understand the impulse that had made him confide in Cassandra...
     他仍然难以理解是什么样的冲动使他向卡桑德拉吐露了秘密。
  3. Wade resisted an impulse to smile.
     韦德强忍住想笑的冲动。
• 脉冲
  Animpulseis a short electrical signal that is sent along a wire or nerve or through the air, usually as one of a series.
• ADJ 一时兴起的;随兴的
  Animpulsebuy orimpulsepurchase is something that you decide to buy when you see it, although you had not planned to buy it.
  1. The curtains were an impulse buy.
     窗帘是一时兴起买下的。
• PHRASE 凭冲动;一时兴起
  If you do somethingon impulse, you suddenly decide to do it, without planning it.
  1. Sean's a fast thinker, and he acts on impulse...
     肖恩是个思维敏捷、行事随兴的人。
  2. After lunch she decided on impulse to take a bath.
     午饭后她突然兴起,决定洗个澡。

英英释义

noun

• the act of applying force suddenly
  1. the impulse knocked him over
  Synonym:impulsionimpetus
• an impelling force or strength
  1. the car's momentum carried it off the road
  Synonym:momentum
• the electrical discharge that travels along a nerve fiber
  1. they demonstrated the transmission of impulses from the cortex to the hypothalamus
  Synonym:nerve impulsenervous impulseneural impulse
• (electronics) a sharp transient wave in the normal electrical state (or a series of such transients)
  1. the pulsations seemed to be coming from a star
  Synonym:pulsationpulsingpulse
• a sudden desire
  1. he bought it on an impulse
  Synonym:capricewhim
• an instinctive motive
  1. profound religious impulses
  Synonym:urge

双语例句

• Wade resisted an impulse to smile.
  韦德强忍住想笑的冲动。
• He still couldn't understand the impulse that had made him confide in Cassandra
  他仍然难以理解是什么样的冲动使他向卡桑德拉吐露了秘密。
• All day she had fought off the impulse to telephone Harry.
  她一整天都在克制自己想给哈里打电话的冲动。
• The impulse of falling water turns the waterwheel.
  落水的冲力使水轮转动。
• On an impulse, I said that.
  我一时冲动，说了那句话。
• The anti-stealth mechanism of high power impulse radar is discussed in details.
  研究了高功率冲激雷达的反隐身机理。
• He finally gave way to an impulse and pulled her toward him.
  他最终还是没能抑制住冲动，把她拉向了自己。
• Many people act on impulse without counting the cost.
  很多人不考虑后果就莽撞行事。
• He was egocentric, a man of impulse who expected those around him to serve him.
  他是个以自我为中心、易冲动的人，希望身边的人都为他服务。
• This makes the TEM horn antennas have good fidelity when radiating and receiving short time domain impulse antenna.
  TEM喇叭天线作为时域脉冲天线，其辐射和接收的时域短脉冲信号具有良好的保真性。