Another cause of high oil prices is the weak American dollar. Oil is traded in dollars, so a less valuable dollar buys less oil. But experts have noted that the weak dollar alone can not explain the increase of about 85% in the price of oil over the last year.
油价上涨的另一个原因是美元的贬值。石油是用美元进行交易的，所以美元价值越低买到的汽油越少。但是专家已经表示仅仅美元的贬值不能解释在过去一内汽油价格增加了85%。
The organization of Patrolian Petroleum 石油exporting countries is the world's largest oil producing group. It says its member nations not including Iraq, are investing 120 billion dollars in over 100 new oil projects. OPEC says it produces about 45% of the world's oil exports.
石油输出国组织是全球最大的石油生产组织。它说他们的成员国不包括伊拉克在内，对超过100个的新石油项目投资了1200亿美元。石油输出国组织说这个项目可以生产出世界石油出口量的45%。
In the past, non-OPEC producers like Russia, Mexico and Norway have increased production to meet demand. But these nations have struggled to keep production at the levels of recent years. Norway's production for example has decreased by 25% since 2001.
过去非石油输出国组织的石油生产国例如俄罗斯、墨西哥和挪威已经增加了产量来满足需求。但是这些国家一直在为保持这几年生产量而努力斗争着。
The expanding economies of Asia, especially China and India, have increased pressure on world supplies. Meeting in demand appears to be harder than ever before.
亚洲国家经济增长，尤其是中国和印度给世界供应量增加了压力。所面临的需要似乎要比以往任何时候都多。