Rivalry gives an impulse to trade. 竞争可促进贸易
He tried hard to resist the impulse of curiosity. 他拚命抑制自己蠢蠢欲动的好奇心.

have an impulse to do sth 有做…的冲动
a man of impulse 感情易冲动的人
act on impulse 凭冲动行事(起恶念,不考虑)
On an impulse he grasped her hand. 他在冲动之下,一把抓住她的手
on the impulse of the moment 出于一时的冲动.