能源公司对此作出了简单的解释：石油与天然气价格自2003年以来就在迅猛增长。

Energy companies offer a simple explanation: oil and gas prices have soared since 2003.

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中国能源安全与石油运输通道之研究。

Energy Security and Fossil Fuel Transportation in China...

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中国能源安全与石油运输通道之研究。

Energy Security and Fossil Fuel Transportation in China...

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