柯林斯詞典impulse /??mp?ls/ (impulses) 1. N-VAR An impulse is a sudden desire to do something. 沖動 Unable to resist the impulse, he glanced at the sea again. 他抑制不住沖動,又看了一眼大海。2. N-COUNT 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. 脈沖 It works by sending a series of electrical impulses which are picked up by hi-tech sensors. 它通過傳輸由高技術(shù)傳感器收集的電脈沖而起作用。3. ADJ 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. 一時心血來潮的[ADJ n] The curtains were an impulse buy. 這窗簾是一時心血來潮買下的。4. PHRASE If you do something on impulse, you suddenly decide to do it, without planning it. 憑一時沖動 Sean's a fast thinker, and he acts on impulse. 肖恩是個思維敏捷、憑一時沖動行事的人。 返回 impulsing