concentration of radioactive element meaning in Chinese

放射性元素浓度

Petrographically and mineralogically similar rocks quite often have different concentrations of radioactive elements .
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。
The relationship between the - ray intensities in atmosphere and the concentration of radioactive elements in soil and the materials of buildings has been established in this paper , based on the theories of the interaction of radiation with matter
摘要建立土壤和建筑物中放射性核素与空气中照射量率之间的理论公式，得出了单边建筑物旁和建筑物之间射线照射量率的分布规律。