isotope ratio meaning in English

同位素比值

The isotope ratio is directly used for comparing oils or gases .
同位素比率直接用于比较各种石油或天然气。
An obvious restraint in the use of isotope ratios results from the need to employ mass spectrometers .
使用同位素比值法有着一个明显的局限因素，就是要用质谱仪进行分析。
A lead isotope ratio data base of ancient chinese bronzes
夏商周青铜器铅同位素示踪研究数据库的构建
The residue analysis in determination of sr isotopes ratio of carbonate
碳酸盐岩锶同位素比值测定中的残渣分析
Isotope ratio measurement
同位素丰度测定

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