The United States petroleum industry's cost to meet environmental regulations is projected at ten percent of the price per barrel of refined petroleum by the end of the decade.

在这十年结束之前，美国石油工业达到环保标准的成本预计为每桶精炼石油价格的10%。

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September Nymex crude oil futures were down 47 cents at $75.30 per barrel.

七月纽约期货交易所原油期货下下降了47美分，收于每桶75.3美元。

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That puts production costs, at $22 per barrel, among the highest in the world.

而这使得英国列居世界石油生产成本最高的国家之一，达到每桶22美元。

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The International Energy Agency has predicted a potential seven million barrel per day gap between supply and demand by 2015.

VOA: standard.2009.10.20

So more profits are generated per barrel of sweet, light than heavier or sour crude oils.

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From 1999 to present, the price of crude oil per barrel has increased by 650 percent.

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Nonetheless it closed the year costing 44% more per barrel than at the start of 2002.

BBC: Oil prices slide from two-year high