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2013-05-23 12:21
求翻译：Surface oil sand processing has been in commercial operation for more than 40 years in Alberta, Canada. In 2010, oil companies in Alberta produced 大约161万barrels of bitumen per day with 大约85.8 万barrels(53%) by mining method, equivalent to annual production of 4970万 metric tons. China has a reserve of 60亿吨oil sands, main是什么意思？ 待解决
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Surface oil sand processing has been in commercial operation for more than 40 years in Alberta, Canada. In 2010, oil companies in Alberta produced 大约161万barrels of bitumen per day with 大约85.8 万barrels(53%) by mining method, equivalent to annual production of 4970万 metric tons. China has a reserve of 60亿吨oil sands, main
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