flight vehicle propulsion system飞行器推进系统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。...the submarine's propulsion system.潜水艇的推进系统Adduction of the upper arm to m...
The quarterback faked to the fullback and handed off to the halfback.四分卫做了个要把球传给后卫的假动作,却把球传给了中卫.He is the greatest quarterback in gridiron history.他是橄榄球场历史上最伟大的四分卫。He demonstrated the all-round skills of a quarterback.他展...