The liquid fuel rocket, which is continually being improved, is used in aircraft as well as for research in the upper air and for putting earth satellites into orbits.
液态燃料火箭不断得到改进，它用在飞行器上，也被用来研究高层大气和把地球卫星送入轨道。
Space programs demand tremendous quantities of liquid hydrogen and oxygen as rocket fuel.
航天计划需要大量的液氢和液氧作为火箭的燃料。
To avoid overheating, the mixture in that process in any liquid-fuel rocket is deliberately not optimal.
为了避免过热，因为在任何液体燃料火箭进程的混合物故意不理想。
Unsymmetrical dimethylhydrazine (UDMH) is the main fuel of liquid rocket propellant. Stress is always laid on the pollution of UDMH to water.
偏二甲肼（UDMH）是液体推进剂的主体燃料，其对水体的污染一直倍受重视。
Solid-fuel rocket engines have a much larger capacity than liquid-fueled iterations.
中国已在西北部城市西安完成最大的固体燃料火箭发动机点火测试。
Solid-fuel rocket engines have a much larger capacity than liquid-fueled iterations.
中国已在西北部城市西安完成最大的固体燃料火箭发动机点火测试。
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