n. [核] 放射性元素
1.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.
居里夫人Marie Curie(1867- 1934)法国国籍波兰科学家，研究放射性现象，发现镭和钋两种放射性元素，一生两度获诺贝尔奖。
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.
居里夫人Marie Curie(1867- 1934)法国国籍波兰科学家，研究放射性现象，发现镭和钋两种放射性元素，一生两度获诺贝尔奖。
3.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。