词汇	摄影留念
释义	摄影留念 take a picture as a souvenir摄影
随便看	Propulsion Research Laboratory propulsions propulsion shaft propulsion shaft alignment propulsion shafting propulsion shaft seal propulsion shaft segment propulsion-shaft system propulsion simulator propulsion, steering propulsion subsystem Propulsion Subsystem Structure propulsion sub-unit propulsion support system propulsion system Propulsion System Analysis Report propulsion-system braking propulsion system clutch propulsion-system clutch propulsion system component propulsion system development facility propulsion system dynamics Propulsion System Laboratory propulsion system of rocket propulsion system of thermal power