The other half will be conventional petroleum.

另一半还是传统的石油。

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The Fuxin Formation coalbed methane system is studied using the theory and method of non-conventional petroleum system.

运用非常规含油气系统的理论和方法研究阜新盆地煤层气系统地质特征。

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The real merit is that we can actually reduce the cost of the backsheet compared to conventional petroleum-based backsheet.

真正的好处是，相对与石油制成的 backsheet， 它的成本较低。

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In fact there is growing evidence that biofuels may actually release more CO2 emissions than conventional petroleum-based petroleum does.

FORBES: Biofuels: Fields Of Pipedreams

In contrast, when the palm is grown on previously cleared land, its emissions are around one fifth that for conventional petroleum-derived diesel.

FORBES: Land Use Changes Are Main Factor In Carbon Emissions From Biofuels

Neither of these products can be directly distilled into gasoline or fuel oil (kerosen, jet, and diesel) or indeed any other conventional petroleum product.

FORBES: Does it Matter if Humans Trash the Planet?