pro·pul·sion /prəˈpʌlʃən/
推進,推進力
Pro·pul·sion n.
1. The act driving forward or away; the act or process of propelling; as, steam propulsion.
2. An impelling act or movement.
God works in all things; all obey
His first propulsion. --Whittier.
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propulsion
n 1: a propelling force
2: the act of propelling [syn: actuation]