虽然氧化氮是种温室效应气体，但当用作火箭燃料燃烧时，排出的副产品仅仅是热氧气和热氮气。

While nitrous oxide is a powerful greenhouse gas, when it's burned as rocket fuel, the only byproducts are hot oxygen and nitrogen.

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调查显示，挑战者号发射当日低温，导致火箭推进器上橡胶O行环密封圈失效，进而引起爆炸性气体泄露。

Theinvestigation showed that low temperatures on the day of the launch caused arubber “O-ring” seal on one of the rocket boosters to fail, which led to a leakof explosive gases.

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这种金属高达6,920华氏度的燃点，释放高温度的气体推进火箭前进。

The metal's high ignition temperature of more than 6,920 degrees Fahrenheit forces exhaust gases out at high velocity to propel rockets upward.

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