radioactive matter的例句大全

In1903 Marie received her doctor's degree for her study on radioactive matter.

由于她在放射性物质方面的研究，玛丽于1903年获得了博士学位。

They discovered two kinds of radioactive matter---- polonium and radium.

他们发现两种类型的放射性物质 ---- 钋和镭.

Heavy-ion 14~ C can not only be directly emitted by three radioactive series ( 238~ U, 235~ U and 232~ Th), but can also be produced by neutrons of the spontaneous fission and α-decay interacting with matter.

由于铀，钍、锕三系能直接发射微量重离子~（14）C，以及自发裂变中子和α-衰变与物质发生核相互作用，也可产生~（14）C。

the most probable explanation of radioactive disintegration is to be found in terms of the modern ideas concerning the structure of matter.

必须根据物质结构的现代观点才能更好地阐明放射性裂变现象。