I phoned him up on the spur of the moment.
我一时心动，给他打了电话。
He must have cooked up his scheme on the spur of the moment.
他肯定是即兴策划了他的方案。
They admitted they had taken a vehicle on the spur of the moment.
他们承认一时冲动之下偷了一辆车。
"This isn't something that happens on the spur of the moment. It takes a great deal of planning and I think it is an indication the police are determined and doggedly pursuing the leads they got."
VOA: standard.2009.09.17
"For instance,we know that mental illness disorders like depression or alcohol use disorders play a major role in European countries, for instance" "But,we have to also look at Asian countries where impulsiveness plays a much more important role, which is that suicide can happen on the spur of the moment."
VOA: standard.2009.09.10
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