英语翻译When the crude oil is obtained from the field,it is take

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英语翻译
When the crude oil is obtained from the field,it is taken to the refineries to be treated.The commonest from of treatment is heating.When the oil is heated,the first vapoursto rise are cooled and become the finest petrol.Petrol has a low boiling point; if a little is poured into the hand,it soon vaporizes.Gas that comes off the oil later is condensed into paeaffin.Last of all the lubricating oils of various grades are produced.What remains is heavy oil that is used as fuel.

从油田里采出得原油会被送到精炼厂加工.最常见的加工方式是加热.加热时首先蒸发的液体,随后被冷却成为最好的汽油.汽油沸点低,倒少许在手上,它立即就会蒸发.随后蒸发出得气体会被压缩成石蜡,最会制成不同质量的润滑油.而剩下的部分是用作燃料的重油.

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