Such systems consume almost no conventional fuel at all.

这种系统几乎不消耗任何传统燃料。

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More efficient internal-combustion engines will wring out mileage from every drop of fuel, and hybrid powertrains will combine an electric motor with a conventional engine.

更高效的内燃发动机将进一步节约油耗，混合动力装置把电动马达同传统引擎组合在一起。

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That means the average hydraulic hybrid would save more than 5,800 gallons of diesel fuel each year over a conventional diesel.

这就意味着一辆普通的液压混合动力车比一辆传统的柴油车每年将节省5800加仑的柴油。

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In road testing a hydraulic hybrid truck in suburban Detroit, Michigan, the EPA found the vehicle used 40 to 50 percent less fuel than conventional diesel trucks while reducing carbon emissions by one third.

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There is no hope for any hydrotreated fuel to come anywhere near conventional diesel or jet fuel prices.

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With conventional fuel prices high and rising, Pag couldn't have picked a better time to take on the challenge.

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