carbon isotopic compositions

• 碳同位素组成

carbon isotopic compositions的用法和样例：

例句

1. The second epiphany was that the extracted gas had a significantly different isotopic makeup from what is usually produced in nuclear reactors.
   第二项大发现是，萃取出来的气体，同位素组成与一般核反应器中所产生的大不相同。
2. The Anqing copper deposit has a complicated sulfur isotope composition ,which can not be explained by the variations of a single sulfur source or the physico-chemical conditions.
   安徽安庆铜矿床的硫同位素组成复杂，不能用单一硫源或物理化学条件的变化来解释。