1. The radioelement content of certain material is higher, when its intensity and radiation dosage exceed certain limit, can cause a harm to human body.
某些材料的放射性元素含量较高，其强度和辐射剂量超过一定限度时，就会对人体造成危害。
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2. My Marie Curie (1867-1934) French nationality Polish scientists to study the phenomenon of radioactive found radium and polonium two radioelement, twice the life of Nobel Prize.
3. My Marie Curie (1867-1934) French nationality Polish scientists to study the phenomenon of radioactive found radium and polonium two radioelement, twice the life of Nobel Prize.
Experts noted that the current urban living environment is the main source of radioactive hazards of indoor radon and radioelement content standard building materials. 专家指出，目前城市生活环境中主要放射性危害的来源有室内氡气及放射性元素含量超标的建筑材料等。
