| 2. | However , the majority of crude oils , and this applies to the heavier , more viscous petroleums , which are processed by distillation , are usually separated into the lighter fractions ( gas , gasoline , naphtha , kerosene , and gas oil ) and the bottom or , as it is more generally called , the reduced crude
但是，经过蒸馏处理的大多数原油，包括比重较大、粘度更大的原油，一般都分离为较轻组分(气、汽油、粗汽油、煤油和粗柴油)和残渣，或者更多称作常压重油。 |
