结果表明，建筑材料中镭含量与氡析出率之间并不完全相关。
It is shown that the radium content is not completely relevant to radon exhalation rate from some building material.
矿石样品放射性镭含量比岩石样品高19倍，为井下氡气的主要来源；
The content of radioactive radium in mineral was 19 times higer than that in rock and served as a chief source of radon.
采集土壤样品，在实验室进行土壤镭含量、含水量、孔隙度和粒径分布等物理性质测量。
Soil radium contents, water contents, soil porosity and grain size were concretely analysed in our laboratory.
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