rocket-propelled grenades.

火箭推进的榴弹。

the first jet-propelled aeroplane.

首架喷气式飞机。

The tiny rocket is attached to the spacecraft and is designed to propel it towards Mars.

微型火箭附在宇宙飞船上，用来推进飞船飞向火星。

the club propels the ball forward rather than up.

球棍把球向前而不是向上推进。