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.

碳同位素记录和沉积速率则能更好地反映气候干湿的变化。

The carbon isotope records and sedimentation rates are most likely to reflect the humidity of climate.

单质硫还会影响气态烃碳同位素组成.

Sulphur can influence the carbon isotopes of gaseous hydrocarbon.

这些中子跟氮元素的核子产生反应，释放出一个质子并产生出活性碳同位素14。

These neutrons react with nitrogen nuclei, giving out a proton and producing the active carbon isotope 14.

这些中子跟氮元素的核子产生反应，释放出一个质子并产生出活性碳同位素14 。

These neutrons react with nitrogen nuclei, giving out a proton and producing the active carbon isotope 14 .

由此建立并标定了油成甲烷及其碳同位素分馏的化学动力学模型。

Based on the experiments above, the chemical kinetic models of methane generated from oil and its fractionation of carbon isotope are constructed and calibrated.

不同的烃类运移方式产生了不同的甲烷碳同位素分馏效应.

Various patterns of hydrocarbon migration would result in different fractionation effects of methane carbon isotopes.

作为附加证据，两者的骨头都做过碳同位素测年，这也证明了它们曾一起生活。

And as added proof, the bones of both have been carbon dated and this proves that they lived together.

本研究同时显示921地震并未对这些河川之稳定碳同位素组成造成影响。

The research also shows that there is not any change in the stable carbon isotopic composition in all these river systems caused by the quake.

采取热模拟实验方法，通过分析产物的天然气组成与碳同位素特征，对渤南洼陷地区天然气成因类型进行判识。

The method of thermal simulation was adopted, via the character of gas composition and isotope , to confirm the gas genesis in Bonan depress zone.