This special kind of constitution relationship provides beneficial condition for the forming of oil derived from coal.

显微组分间的这种配置关系为煤成油藏的形成提供了非常有利的条件。

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It challenges the old concept that coal-derived oil, condensate and some light oils do not emit fluorescence.

否定了认为煤成油、凝析油及部分轻质油不发荧光的观念。

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The third selling point: Hydrogen could, in principle, deliver energy independence to every nation because it can be derived using any number of sources-including oil, natural gas, nuclear fission, coal, hydroelectric power and wind.

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