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。
To avoid overheating, the mixture in that process in any liquid-fuel rocket is deliberately not optimal.
长征七号为液体燃料火箭，长53米，重597吨，可以运载重达13.5吨的货物到低空轨道。
The 53-meter, 597-ton, liquid-fueled rocket can carry up to 13.5 tons into low-Earth orbit.
第一个使用液氧碳氢推进剂的国产液体燃料火箭发动机被安装在了火箭的E段上，它可以提供5.6吨的推力。
The first native liquid-fueled rocket engine used a liquid oxygen and carbon-hydrogen propellant, provided 5.6 tons of thrust, and was installed in unit e.
第一个使用液氧碳氢推进剂的国产液体燃料火箭发动机被安装在了火箭的E段上，它可以提供5.6吨的推力。
The first native liquid-fueled rocket engine used a liquid oxygen and carbon-hydrogen propellant, provided 5.6 tons of thrust, and was installed in unit e.
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