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。
Chemical rocket
原声例句
经济学人（汇总）
彭博洞察
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。
新概念英语.英音版.第四册(译文)
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。
中文百科
火箭发动机 Rocket engine
（重定向自Chemical rocket）
火箭发动机是喷气发动机的一种，<ref ="RPECH1">Rocket Propulsion Elements; 7th edition- chapter 1</ref>将推进剂箱或运载工具内的反应物料（推进剂）变成高速射流，由于牛顿第三定律而产生推力。火箭发动机可用于航天器推进，也可用于导弹等地面应用。大部分火箭发动机都是内燃机，也有非燃烧形式的发动机。
英语百科
Rocket engine 火箭发动机
（重定向自Chemical rocket）
A rocket engine is a type of jet engine that uses only stored rocket propellant mass for forming its high speed propulsive jet. Rocket engines are reaction engines, obtaining thrust in accordance with Newton's third law. Most rocket engines are internal combustion engines, although non-combusting forms (such as cold gas thrusters) also exist. Vehicles propelled by rocket engines are commonly called rockets. Since they need no external material to form their jet, rocket engines can perform in a vacuum and thus can be used to propel spacecraft and ballistic missiles.
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