Internal Combustion Engines 内燃机 Alternate fuels 替代燃料 Advanced Refrigeration and Air Conditioning 先进的制冷和空调 ..
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Have a safe alternate heating source and alternate fuels available.
准备安全的候补热源和候补可用燃料。
In contrast, normal people would take about 48 hours to develop that altered metabolic state so cirrhotics use alternate fuels more quickly and preferentially.
相比之下，正常人出现这种代谢状态的改变大约需要48小时，而肝硬化患者则较快，并优先通过这些途径获得能量。
The characteristics of alternate fuels, such as natural gas, liquid petroleum gas, hydrogen, dimethyl ether, alcoholic fuel, and biomass fuel, were introduced.
问题的原因是当我们燃烧矿物燃料——煤、油和天然气时，我们将二氧化碳排放到大气之中。
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