因此在我们继续实现燃料供应多样化的时候，我们还必须以对环境敏感的方式增加国内石油的产量。

So as we continue to diversify our fuel supply, we must also step up domestic oil production in environmentally sensitive ways.

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持续的高油价，以及世界人口对能源、液体燃料及化学品的日益增长的需求，造成能源生产主要原料的多样化。

Persistently high oil prices, as well as the growing need of the world's population for energy, liquid fuels and chemicals, trigger the diversification of the primary sources for their production.

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