early 15c., "driving, pushing, thrusting," from Old French impulsion (early 14c.), from Latin impulsionem (nominative impulsio) "external pressure," figuratively "incitement, instigation," noun of action from past participle stem of impellere (see impel).
权威例句
1. Lack of food and water provided much of the impulsion for their speed.
缺少食物和水促使他们加快了速度。
2. Under the impulsion of its screw the " Resolute'sailed down the Thames.
决心号在暗轮的推动下向泰 晤 士河驶去.
3. I love the regretless youth but not the childish impulsion.
我爱无悔的青春,却不喜欢幼稚的冲动.
4. Don't lose your conscience because of the temporary impulsion.