pro·pul·sion
noun/prəˈpʌlʃn/
/prəˈpʌlʃn/
[uncountable] (specialist)- the force that drives something forward
推进；推动力 - wind/steam/jet propulsion
风力／蒸汽／喷气推进 - The fish uses its tail fins for propulsion through the water.
鱼利用尾鳍在水中推进。
Oxford Collocations DictionaryPropulsion is used before these nouns:- system
Word Originearly 17th cent. (in the sense ‘expulsion’): from medieval Latin propulsio(n-), from Latin propellere ‘drive before (oneself)’. - wind/steam/jet propulsion