美[pr??p?l??n] 1 . The nineteenth century witnessed a revolution in ship design and propulsion .
19世紀船舶設計和船舶動力領域發生了重大的變革。
來自柯林斯例句
2 . Interest in jet propulsion was now growing at the Air Ministry.
航空部對噴氣推進的興趣正在增加。
來自辭典例句
3 . The liquids employed for rocket propulsion are called propergols.
用于火箭發動機的液體稱為液體火箭推進劑.
來自辭典例句
4 . The propulsion system consists of five F - 1 engines.
推進系統包括五個F -1 發動機.
來自辭典例句
5 . The essential quality that dictates the choice of this propulsion system is readiness.
決定選用這種推進系統的主要因素就是其簡便性.
來自辭典例句
1.推進器
2. 推進力
1.①前沖步態
2.②慌促步態：同festination
