n.凭冲动行事,突如其来的念头,[电子]脉冲,[医]冲动,搏动
adj.冲动的
v.推动
After lunch she decided on impulse to take a bath.
午饭后她突然兴起,决定洗个澡。
Sean's a fast thinker, and he acts on impulse.
肖恩是个思维敏捷、行事随兴的人。
All day she had fought off the impulse to telephone Harry.
她一整天都在克制自己想给哈里打电话的冲动。