propulsion例句
The nineteenth century witnessed a revolution in ship design and
propulsion.
19世纪船舶设计和船舶动力领域发生了重大的变革。
Interest in jet
propulsion was now growing at the Air Ministry.
航空部对喷气推进的兴趣正在增加。
The liquids employed for rocket
propulsion are called propergols.
用于火箭发动机的液体称为液体火箭推进剂.