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The tar sands resource base exceeds a trillion barrels, dwarfing the Middle East.
FORBES: Egypt fallout -- follow Exxon and T Boone Pickens; go long natural gas and frack-baby-frack
Crude from the tar sands and other unconventional sources could keep oil flowing well into the middle of the century, and perhaps beyond.
NEWYORKER: Unconventional Crude
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。