Question

impulse n.推动,刺激,冲动,推动力 vt.推动 If you act on a sudden feeling or thought, you’re following an impulse. That's like a whim: an impulse isn't something you've given a lot of thought. Another meaning of impulse is an electrical charge or pulse. Electrical impulses are coursing through wires all through your house every day. Both kinds of impulses make things happen. The electrical impulse keeps the refrigerator going, and then you have an impulse to eat all the ice cream in the fridge. ★★☆☆☆ 2012.6

Accepted Answer

['impʌls] An impulse is a sudden force or desire — this could be an electrical impulse, or an impulse to get some pizza. In physics, one approach takes this impulse for unification to its extreme, and seeks a theory of everything—a single generative equation for all we see. 1[N-VAR 可变名词]冲动；一时兴起的念头 An impulse is a sudden desire to do something.   [oft N to-inf]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。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。Wade resisted an impulse to smile.韦德强忍住想笑的冲动。2[N-COUNT 可数名词]脉冲 An impulse is a short electrical signal that is sent along a wire or nerve or through the air, usually as one of a series. 3[ADJ 形容词]一时兴起的；随兴的 An impulse buy or impulse purchase is something that you decide to buy when you see it, although you had not planned to buy it.   [ADJ n]The curtains were an impulse buy.窗帘是一时兴起买下的。4[PHRASE 短语]凭冲动；一时兴起 If you do something on impulse, you suddenly decide to do it, without planning it.   [PHR after v]Sean's a fast thinker, and he acts on impulse...肖恩是个思维敏捷、行事随兴的人。After lunch she decided on impulse to take a bath.午饭后她突然兴起，决定洗个澡。

英语单词	impulse
英美音标	['impʌls]
中文释义	n.推动,刺激,冲动,推动力 vt.推动
vocab简明	An impulse is a sudden force or desire — this could be an electrical impulse, or an impulse to get some pizza.
vocab扩展	If you act on a sudden feeling or thought, you’re following an impulse. That's like a whim: an impulse isn't something you've given a lot of thought. Another meaning of impulse is an electrical charge or pulse. Electrical impulses are coursing through wires all through your house every day. Both kinds of impulses make things happen. The electrical impulse keeps the refrigerator going, and then you have an impulse to eat all the ice cream in the fridge.
真题原句	In physics, one approach takes this impulse for unification to its extreme, and seeks a theory of everything—a single generative equation for all we see.
柯林斯星级	★★☆☆☆
柯林斯解释	1 [N-VAR 可变名词]冲动；一时兴起的念头 An impulse is a sudden desire to do something. [oft N to-inf] 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。 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。 Wade resisted an impulse to smile. 韦德强忍住想笑的冲动。 2 [N-COUNT 可数名词]脉冲 An impulse is a short electrical signal that is sent along a wire or nerve or through the air, usually as one of a series. 3 [ADJ 形容词]一时兴起的；随兴的 An impulse buy or impulse purchase is something that you decide to buy when you see it, although you had not planned to buy it. [ADJ n] The curtains were an impulse buy. 窗帘是一时兴起买下的。 4 [PHRASE 短语]凭冲动；一时兴起 If you do something on impulse, you suddenly decide to do it, without planning it. [PHR after v] Sean's a fast thinker, and he acts on impulse... 肖恩是个思维敏捷、行事随兴的人。 After lunch she decided on impulse to take a bath. 午饭后她突然兴起，决定洗个澡。
来源	2012.6

Impulse Electrical Sudden Buy Desire Decide Impʌls N.推动,刺激,冲动,推动力