在中国北方的家庭中仍然普遍实用煤作为燃料。
In northern part of China, there is still wide spread use of coal burners to heat homes.
例如，蒸汽发动机可以用煤，报纸或木头作为燃料，而内燃机需要用纯的，高质量液体燃料或气体燃料。
For example, a steam engine can use coal, newspaper or wood for the fuel, while an internal combustion engine needs pure, high-quality liquid or gaseous fuel.
初始推进力由一拥有九个引擎的引擎组提供，使用煤油和液氧作为燃料。
The initial thrust is provided by the nine-engine cluster, fuelled by kerosene and liquid oxygen.
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