on the spur of the moment什么意思解释

They admitted they had taken a vehicle on the spur of the moment.他们承认是一时冲动偷走了一辆车。He must have cooked up his scheme on the spur of the moment.他肯定是一时冲动策划了这个阴谋。He asked her to marry him on the spur of the moment.他一时冲动之下向她求婚...

on the spur of the moment的音标：...