We will need to switch from cars with internal-combustion engines to hybrids, plug-in hybrids, battery-powered, and fuel-cell-powered vehicles.

我们要让使用内燃机的汽车变成混合动力，油电混合，电池驱动，以及燃料电池驱动的汽车。

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In other words, the fuel-cell powered car requires only half the fuel energy that the internal-combustion powered car does to go the same distance.

换句话说，行驶相同的距离，使用燃料电池发动机汽车只需要消耗内燃机汽车的一半能量。

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Third, fuel-cell engines will soon be economically competitive because people will spend less money to operate a fuel-cell engine than they will to operate an internal-combustion engine.

第三，因为燃料电池发动机的使用费用比内燃机发动机低，燃料电池发动机很快就会在价格上很有竞争力了。

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"Lots and lots of things are happening that indicate a worldwide interest, and most of the knowledgeable people are convinced that the next-generation replacement for the internal combustion engine is going to be a fuel cell, " Roan said.

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It can be used to run an internal combustion engine in a car or power one using a fuel cell, with heat and water as the only emissions.

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The technology isn't new-a patent for a hydrogen internal combustion engine was issued in 1928, and a 20hp fuel-cell tractor was demonstrated in the late 1950s.

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