| 1.The crude oil separates into fractions according to weight and boiling point. 译文： 原油根据重量和沸点的不同而分解。 | |
| | 2.Petroleum products are those fractions derived from petroleum that have commercial value as a bulk product.译文：石油产品是指那些从石油中提炼得到的、具有商业价值可用作散装油品的馏分。 | |
| | 3.The first step in refining is the separation of petroleum into fractions by fractional distillation in an oil refinery.译文：炼油厂石油炼制过程的第一步是采用分馏法将石油分解成各种馏分。 | |
| | 4.Distillation is a physical process used to separate mixtures that contain at least one liquid.译文：蒸馏是一种用来分离含有一种以上组分液体混合物的化学过程。 | |
| | 5.If the difference in boiling points is greater than 25 °C, a simple distillation is used. 译文：如果各组分的沸点差大于25°C，可采用分馏的方法。 | |
| | 6.The high-boiling hydrocarbons that are isolated and liquefied are called natural gas condensates.译文：被分离并液化的高熔点的碳氢化合物叫做天然气。 | |
| | 7.The vapor enters the bottom of a long column (fractional distillation column) that is filled with trays or plates. 译文：蒸汽进入装有塔板的分馏塔底部。 | |
| | 8.Some refineries also have cokers, which use heat and moderate pressure to turn the really heavy fractions into lighter products and a hard, coal like substance that is used as an industrial fuel. 译文：有些炼油厂还有焦化装置，可在高温和中压下将重馏分转化为较轻馏分和一种坚硬、似炭的物质，这种物质可用作工业燃料 | |
| 1.高分子量 | |
| | 2.building blocks | |
| | 3.liquefied petroleum gas | |
| | 4.分馏 | |
| | 5.calcium carbide | |
| | 6.石油焦(炭) | |
| | 7.vapor phase | |
| | 8.heat exchangers | |
| | 9.高沸点的物质 | |
| | 10.acetylene | |
| | 11.storage tank | |
| | 12.kerosene | |
| | 13.cat cracker | |
| | 14.ethyl alcohol | |
| | 15. light distillates | |
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