Orion could reach Mars in weeks, where chemical rockets would take six months or more.

“猎户座”火箭可以在几周内到达火星，而化学燃料火箭则需要6个月甚至更长时间。

And most satellites have thruster on board a chemical rocket or an electric thruster.

大多数卫星都有化学火箭或电动推进器上的推进器。

Similarly, our own present primitive chemical rockets, though good enough to orbit men, have no chance of transporting us to the nearest other star, four light years away, let alone distances of tens or hundreds of light years.

同样，我们目前使用的原始化学火箭，虽然把人送入轨道，但尚不能把我们送到离我们最近、相距4光年的其他星球上去，更不用说几十光年或几百光年远的地方了。