碳氧同位素 carbon and oxygen isotope ; c o isotope
碳氧稳定同位素组成 carbon and oxygen stable isotopes
碳氧氢同位素 C_O_H isotope evidence
二氧化碳碳同位素测定 C0_2 carbon isotope measuring
对山东东营盆地和南海珠江口盆地早第三纪生油层中的湖相碳酸盐氧碳同位素进行了分析。
Stable carbon and oxygen isotopic analyses of lacustrine carbonates ins ource rocks from the Dongying Basin(Shandong Province)and the Zhujiang Kou Basin(South China Sea)have been carried out.
碳的一个同位素碳14也是稳定的，氧的情形也是这样，因此生命必须的有机反应成为可能。
An isotope of carbon known as carbon-14 would also be stable, as would a form of oxygen, so the organic reactions necessary for life would be possible.
因为如果是那样的话，阳光将会被转换成大量的碳、氧原子保存到石灰岩中的碳酸钙里，而事实却是，岩层的同位素组成（Isotopic composition）中没有留下任何蛛丝马迹。
They would leave subtle clues in the isotopic composition of the limestone by shifting the ratios of light to heavy carbon and oxygen atoms in its calcium carbonate.
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