每年通过使用更加省能源的PC与保存13亿桶的价值等效。

The annual savings by the feds using more energy efficient PCs would be equivalent to conserving 1.3 billion barrels of oil.

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超声提取高效、省时、省能源，是比较好的提取方法。

Ultrasound extraction was high efficiency, rapid and saving energy, and was the best extraction methods.

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虽然河北省能源总量较为丰富，但人均储量却相对匮乏。

Though the energy is more abundant in Hebei province, but the per capita reserves are relatively scarce.

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