on the spur of the moment的音标？

凭一时冲动，日不移晷...

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...