on impulse
一时冲动 suddenly and without previous thinking or planning
She wrote that letter on impulse.她一时冲动写了这封信。
句型例句
He felt an irresistible impulse to rush into the room.他有一种难以抗拒的冲动想冲进房间。
She had a sudden impulse to go on holidays.她突然心血来潮想去度假。
Her first impulse was to walk out and leave him.她的第一个想法就是走出去离开他。
The plan will give an impulse to industrial expansion.这个计划将促进工业的扩展。
