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油 |
A greasy, viscous CompoundSubstance that cannot be mixed with Water. Note that this general class covers petroleum oil, vegetable oil, animal fat, etc.
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化石燃料 | FossilFuel is the subclass of Fuel whose instances are derived from fossilized organic deposits, such as Coal and LiquefiedPetroleumGas. |
| | 石油 | Petroleum is commonly known as crude oil. It is a thick, dark brown or greenish flammable liquid, which exists in the upper strata of some areas of the Earth's crust. It consists of a complex mixture of various hydrocarbons, largely of the methane series, but may vary much in appearance, composition, and purity. (from Wikipedia) Crude oil has not be subject to the distillation that will yield a RefinedPetroleumProduct. |
| | 精炼石油产品 | A Substance that is the result of the Distilling of Petroleum. |