飞船的推进器推动它前进。

The spaceship's ___thrusters propel it forward.

宇航员启动推进器来微调空间站的轨道。

The astronauts fired the ___thrusters to fine-tune the space station's orbit.

举重运动员利用腿部爆发力推动身体向上。

The weightlifter used powerful leg ___thrusters to push his body upward.