碳同位素显示的格局，但它是较为困难的解释比氧同位素模式。
Carbon isotopes show a pattern, but it is somewhat more difficult to interpret than the oxygen isotope pattern.
烃源岩热解气碳同位素分析结果表明，随成熟度增大，乙烷碳同位素随之变重，只是受影响的程度比甲烷小。
Hydrocarbon source rocks by carbon isotope analysis results showed that with the increase of carbon isotope, ethane maturity turns heavy, just smaller influenced than methane.
如果火星上的甲烷是生命现象产生的，那么释放出的甲烷和水应该明显表现出氢和碳的同位素比。
Methane and water released on Mars should show distinctive ratios for isotopes of hydrogen and carbon if life was responsible for methane production.
如果火星上的甲烷是生命现象产生的，那么释放出的甲烷和水应该明显表现出氢和碳的同位素比。
Methane and water released on Mars should show distinctive ratios for isotopes of hydrogen and carbon if life was responsible for methane production.
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