a strong urge to do something
冲动
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the impulsion of the singers to govern the pace .歌手们想控制节奏的冲动。
[mass noun]the force or motive behind an action or process
动力,动机
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attitudes changed under the impulsion of humanitarian considerations .出于人道主义考虑,态度发生了改变。
"late Middle English (in the sense ‘the act or an instance of impelling’): via Old French from Latin