化学燃料动力火箭可以提供克服地球引力所必须的强大推进力。
Chemical rockets have the high thrust necessary to lift rockets into space, overcoming the Earth's gravitational pull.
但是像秦先生这样为响个不停的燃料动力犁而发愁的人,谁来给他们建议?
But what about the advice that the likes of Mr Qing needs as he struggles with his clattering plough - who helps supply that?
上世纪90年代,氢燃料动力汽车的拥护者们曾预测燃料电池汽车最早能在次年进入消费者市场。
In the 1990s, proponents predicted consumers could be driving fuel-cell vehicles as early as next year.
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