n.推進(jìn)；推進(jìn)力
This aircraft works by jet propulsion. 這架飛機(jī)是噴氣推進(jìn)的。
The fish uses its tail fins for propulsion through the water. 魚靠尾鰭在水中前進(jìn)。
No propulsion occurs at this time. 此時(shí)無推進(jìn)力產(chǎn)生。
