一项由美国研究者们发表在科学杂志上的研究，就阿波罗号从月球返回地球后，带来月球上许多氯的同位素进行了分析。
A study by US researchers, published in Science, analysed chlorine isotopes of the much-studied samples, brought to Earth by the Apollo space missions.
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。
The second epiphany was that the extracted gas had a significantly different isotopic makeup from what is usually produced in nuclear reactors.
一项研究报告说，科学家可以通过分析象尾毛发的同位素成分从而读出一头象的多年饮食记录。
The dietary and movement history of individual animals can be studied using stable isotope records in animal tissues, providing insight into long-term ecological dynamics and a species niche.
计算压水堆与时间相关的、大量同位素的源项及其强度。
Calculating source terms of pressure water reactor (PWR) that are time-related and of a lot of isotopes and their intensity.
植物稳定碳同位素技术是近年兴起的一项快速、可靠的技术。
Stable carbon isotope analysis is a rapid and reliable technique developed in recent years and may reveal many processes of carbon dynamics in plants.
一项对这些颗粒的同位素分析让这种担心成真了。
An isotopic analysis of the grains has made that fear come true.
大气降水的同位素含量是国家的一项基本环境数据，也是开展环境同位素科学研究和环境同位素水文地质工作必不可少的基础资料。
The precipitation isotopic content is one kind of national basic environmental data, indispensable for the environmental isotope scientific research, including environmental isotope hydrogeology.
大气降水的同位素含量是国家的一项基本环境数据，也是开展环境同位素科学研究和环境同位素水文地质工作必不可少的基础资料。
The precipitation isotopic content is one kind of national basic environmental data, indispensable for the environmental isotope scientific research, including environmental isotope hydrogeology.
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