但大部分厂家开始使用苯——一种由石油提炼的碳化氢来生产阿司匹林。
Yet most aspirin manufacturing begins with benzene, a hydrocarbon that is typically derived from petroleum products.
与冶炼矿石一样，石油提炼是一个从未加工的原料中除去杂质的过程。
Refining, like smelting, is a process of removing impurities from a raw material.
异丁醇能转化为航空燃料，也可以作为原料来制造塑料或其他通常由石油提炼的化工产品。
It can also be turned into jet fuel, and it can be used as a raw material for the manufacture of plastics and many other chemicals normally derived from petroleum.
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