小组只是假设维珍银河号的橡胶燃料引擎，每燃烧1千克的燃料会释放60克黑碳。
The team assumed that Virgin Galactic's rubber-burning engine would emit 60 grams of black carbon per kilogram of fuel burned.
小组只是假设维珍银河号的橡胶燃料引擎，每燃烧1千克的燃料会释放60克黑碳。
The team assumed that Virgin Galactic's rubber-burning engine would emit 60 grams of black carbon per kilogram of fuel burned.
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