167美国东北部的家庭因冬天很冷，常用油作为他们的主要的采暖燃料。

Homes in the northeastern United States, where winters are typically cold, have traditionally used oil as their major fuel for heating.

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有评论指出，制造氢气代价很高，而最常用的制造氢气方法还是通过使用石油燃料来实现的。

Critics also point out that hydrogen is costly to produce and the most common way to produce hydrogen is still from fossil fuels.

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采暖锅炉是一种常用的锅炉，它以煤、燃油、燃气、动力电等燃料为加热源。

Heating boiler is a kind of commonly used boiler, which USES coal, fuel oil, gas, power and other fuels as heating source.

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