During the second quarter, CEO Bill Klesse said, the company's refineries took advantage of higher margins on products and wider discounts on so-called sour crude oils.

公司首席执行官比尔·克莱西(Bill Klesse)表示，第二季度炼油业务盈利出现增长是因产品利率更高，而酸性原油折扣规模更大。

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The main method of separation used in refineries is fractional distillation although further processing is normally required to produce marketable petroleum products.

分离石油主要采用的方法就是分馏，然后通过深加工才能得到可以销售的石油产品。

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Sinopecs imports the bulk of the crude oil for its refineries at international market prices and sells the refined products to consumers at Beijing-capped prices.

中石化旗下炼油厂所使用的原油，大部分以国际市场价格进口。但中石化向消费者出售的成品油，却是按北京限定的价格。

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Bush's plan, which aims to insulate consumers from high prices while fattening stores of gasoline and other refined oil products, will likely call for the boosting of domestic refining capacity, perhaps by building as many as 40 oil refineries over the next 20 years.

CNN: Bush ready to release 'optimistic' energy plan