音标：['impʌls]
n. 冲动, 驱使, 刺激, 推动, 冲力, 建议, 脉冲
vt. 推动
【化】 脉动
【医】 冲动, 搏动
在线英汉词典

impulse的短语、例句：

impulse n 1 (a) [C] ~ (to do sth) sudden urge to act without thinking about the results 凭冲动行事（未顾及後果）; 突如其来的念头
He felt an irresistible impulse to jump. 他突然有个无法抗拒的冲动, 想跳下去.
check/curb/resist an impulse 抑制[约束/遏止]冲动. (b) [U] tendency to act in this way 好冲动行事
a man of impulse 易冲动的人. 2 [C] push or thrust; stimulus; impetus 推动; 冲力; 刺激; 推动力
give an impulse to industrial expansion 促进工业的扩展. 3 [C] stimulating force in a nerve or an electric circuit that causes a reaction 神经冲动; 电路脉冲: nerve impulses神经冲动. 4 (idm 习语) on impulse suddenly and without previous thinking or planning 一时冲动
On impulse, I picked up the phone and rang my sister in Australia. 我一时心血来潮, 拿起话筒就给在澳大利亚的妹妹打了个电话.