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。
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.