元素丰度 elemental abundance
- 岩石学矿物学上类似的岩石,其放射性元素丰度却往往有所不同。
Petrographically and mineralogically similar rocks quite often have different concentrations of radioactive elements. - 对化学元素丰度的观测,是否能够使遥远未来的宇宙学家获得关于大霹雳的知识呢?
Would observations of the abundances of chemical elements lead cosmologists of the distant future to a knowledge of the big bang? - 利用分量系数公式并结合太阳系元素丰度的最新数据,计算了64颗贫金属星的中子俘获元素丰度。
By means of the component coefficient equation and the updated data of abundances of the solar system, we calculate the element abundances of 64 poor-metal stars.
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