radioactive
/ˌreɪdɪəuˈæktɪv; ˌredɪo`æktɪv/ adj
having atoms that break up and send out radiation which canpenetrate opaque bodies and sometimes produce harmfulelectrical effects 放射性的; 有辐射能的
Radium and uranium are radioactive elements. 镭和铀是放射性元素.
,radioactive `fall-out, ie dust carried by winds around the earth after a nuclear explosion, etc 放射性微粒回降（核爆炸等之後放射性尘埃随风散落到地面）
radioactive waste, ie waste material from nuclear power-stations, etc 放射性废料（核电站等产生的核废料）.