Lead isotope ratio

• 铅同位素比值

Lead isotope ratio的用法和样例：

例句

1. 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。
2. Precise determination of the platinum-group elements and Os isotopic ratios in low-level rock samples.
   岩石样品中低含量铂族元素和锇同位素比值的高精度测量方法。