| 1.Only then does the temperature of the remaining mixture rise and other components are boiled off. 译文：只有到了那个时刻剩余混合物的温度才会上升，其他组分才会汽化。 | |
| | 2.Petroleum products are hydrocarbon compounds, containing combinations of hydrogen and carbon with various molecular forms.译文：石油产品是碳氢化合物，他们含有不同的氢原子和碳原子。 | |
| | 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.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。 | |
| | 5.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。 | |
| | 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.Natural gas is predominantly methane (CH4), which has the lowest boiling point and least complex structure of all hydrocarbons.译文：天然气的主要成分是甲烷，在所有的烃类化合物中甲烷的沸点最低，结构最简单。 | |
| | 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.分馏 | |
| | 2.liquefied petroleum gas | |
| | 3.kerosene | |
| | 4.cat cracker | |
| | 5.ethyl alcohol | |
| | 6.石油焦(炭) | |
| | 7.分离技术 | |
| | 8.vapor phase | |
| | 9.高沸点的物质 | |
| | 10.高分子量 | |
| | 11.acetylene | |
| | 12.石油 | |
| | 13.冷凝器 | |
| | 14. light distillates | |
| | 15.building blocks | |
|
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