同位素测定年龄 isotopic dating
同位素测定年代 isotopic dating
同位素测定法 isotopic measurement
硼同位素测定 Boron-isotopes determination
碳氢同位素测定 Stable hydrogen and Carbon Isotopic Composition
同位素丰度测定 isotope ratio measurement
地下水同位素测定 isotope assaying of groundwater
二氧化碳碳同位素测定 C0_2 carbon isotope measuring
同位素功能测定仪 isotope function tester
对浙江江山碓边下寒武统上部—下奥陶统下部碳酸盐岩进行了碳氧同位素测定。
The studied carbonate rocks dealt with in this paper were collected from the classic section of the Cambrian to Lower Ordovician age at Duibian of Jiangshan, Zhejiang.
根据碳同位素测定，该亚麻布产于1260年至1390年之间，不过许多人坚持认为这是伪造的。
Radio carbon dating puts the origin of the shroud between 1260 C. E. and 1390 C. E., consistent with the theory that it was a forgery.
气温变化周期是根据氧同位素测定的大量远古温度记录而推演出来的。 气温变化周期与人类演化进程的对照，暗示“黄金时期”与气候急剧波动而短暂的时期相对应。
What marked out this period was a greater range of recorded temperatures, suggesting it was a time of rapid but short-lived fluctuations in climate.
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