noun [抽象名词] 冲动；脉冲；推动力
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. 脉冲
adjective [原级] 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. 一时心血来潮的
verb [vt. 及物动词] 推动
They tend to act out of impulse. 他们往往冲动行事。
- impulse 出现在下面的课文中（提供视频、音频及笔记等可系统性学习）
- Lesson 23 One man's meat is another man's poison impulse 名词: 冲动
- Lesson 58 A spot of bother
