欧洲年久老旧的炼油厂无法加工更重质的沙特原油,且这里的燃料规定对硫磺含量没世界其他地方那么宽容。
Europe's creaky old refineries will not be able to process the heavier Saudi crude, and fuel regulations there are less tolerant of sulphur content than elsewhere in the world.
因此,植物燃烧不像煤碳和石油之类的化石燃料,它们在燃烧过程中不会增加大气中的碳含量。
So unlike with fossil fuels such as coal and oil, burning them does not add new carbon to the atmosphere.
为将燃料做成电能反应堆,铀被浓缩至U-235同位素含量5%以下。
To make fuel for electricity-generating reactors, uranium is enriched to less than 5 percent of the isotope U-235.
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