原料、给料：作为原料，利用其化学成分，以生产终端产品的物质(如煤气)。
Feedstock: Substance (e. g. gas) used as raw material for its chemical properties in creating an end product.
在银行或其他地方，你可能会听到“公用事业帐单”这个词——它就是指与家庭服务有关的账单，如电费、煤气费、水费和电话费。
In the bank, and elsewhere, you may hear the term 'utility bill'—this simply refers to bills relating to the provision of services to your home, such as electricity, gas, water and telephone.
它在采掘过程中无须燃烧如煤炭，煤气或石油这类矿石燃料。
It can be extracted without burning a fossil fuel such as coal, gas, or oil.
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