When it is time for a new car, choose a more fuel efficient vehicle.
该买台新车时，选辆最省燃料的吧。
Diesel engines are the most fuel efficient vehicle power source available.
柴油发动机是现有燃油效率最高的机器。
Fuel cell vehicle is a kind of high-efficient clean electric vehicle.
燃料电池汽车是一种高效清洁的电动汽车。
Fuel cell vehicle is a kind of high-efficient clean electric vehicle.
燃料电池汽车是一种高效清洁的电动汽车。
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