首先，再循环使用的燃料比原来的铀更贵。
First, the recycled fuel is more expensive than the original uranium.
它从糖生产燃料比其他微生物多5到10倍。
They also produce five to 10 times more fuel from the same amount of sugar.
寒冷的空气中摄入可以帮助你提高你的燃料经济的空气燃料比。
Cold air intakes can help your fuel economy by improving your air to fuel ratio.
脂肪比碳水化合物的燃料效率低多了。
仅仅是这一个原因，这些燃料就比乙醇更有效率。
以质量计的燃油消耗率有所增加，但以燃料热值计的比能耗降低。
The brake specific fuel consumption is increased, but brake specific energy consumption can be improved.
以质量计的燃油消耗率有所增加，但以燃料热值计的比能耗降低。
The brake specific fuel consumption is increased, but brake specific energy consumption can be improved.
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