propulsion
/prəʊˈpʌlʃən/noun
mass noun
- the action of driving or pushing forward推进：
they dive and use their wings for propulsion under water.
它们潜入水下, 用双翼推进。
派生词
propulsive
adjective词源
early 17th cent. （in the sense 'expulsion'）： from medieval Latin propulsio（n-），from Latin propellere 'drive before (oneself)'.