hydrogen-poor bitumen
... hydrogenous 水成的 hydrogen-poor bitumen 贫氢沥青 hydrogen-sulfide-forming bacteria 生成硫化氢的细菌 ...
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其有机元素组成以贫氢、富氧、富硫为特征，属高热演化且受硫酸盐热化学还原作用影响的焦沥青类。
The organic elementary compositions of the bitumen are characterized by poor hydrogen and rich oxygen and sulfur, suggesting that it is of pyrobitumen as a result of high maturity and TSR.
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