| 释义 | on (an) impulsephrase
 C2
 because you suddenly want to, although you haven't planned to: 一时兴起,心血来潮
 "I didn't know you were looking for some new shoes." "Oh, I wasn't - I just bought them on impulse."“我不知道你想要买双新鞋。”“噢,不是的——我只是一时冲动才买的。”
 She decided, on an impulse, to get in touch with some of her old classmates.
 On an impulse, he went into the florist's and bought a huge bunch of roses.
 He called Judy on impulse and invited her to lunch.
 Acting on impulse, she grabbed her camera and ran after the man.
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