radioactivity

英 [ˌreɪdiəʊæk'tɪvəti]

美 [ˌreɪdioʊæk'tɪvəti]

n. 放射性; 放射(现象)

BNC.16448 / COCA.20084

柯林斯词典

ADJ-GRADED 放射性的;有辐射的
Something that isradioactivecontains a substance that produces energy in the form of powerful and harmful rays.
1. The government has been storing radioactive waste at Fernald for 50 years.
  政府在弗纳德存放放射性废料已达50年之久。

noun

the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
Synonym:radiation

( combining form) indicating radiation or radioactivity.
（化和形式）指示放射或放射能的。
The air survey is specially superior in the regional environmental radioactivity survey, which is recommended by IAEA.
在区域环境放射性测量中，航测具有特殊的优势，是IAEA推荐的手段。
With radioactivity, if you give me a single atom of uranium, I can tell you it will eventually decay.
就放射性现象来说，你如果给我一个铀原子，我可以告诉你它最终会衰变。
Radioactivity is a special quality of radium.
放射性是镭的一种特性。
Equipment used to treat diseases with x-rays or radioactivity.
利用x光或放射能治疗疾病的装备。
The decrease in percentage difference of radioactivity over these two sites indicates the rate of thrombus dissolution.
两部位放射活性百分比差异的减少提示了血栓的分解率。
Some of that radioactivity could carry in the atmosphere to the west coast of the United States.
某些核辐射可能通过空气传播到美国西海岸。
Conclusion It was succeed keys to treat and nurse of esophagitis of radioactivity.
结论放射性食管炎的治疗和护理，是放疗成败的关键。
Instead they found little more than background levels of radioactivity.
然而，他们只发现了和背景放射性差不多的放射性水平。
Some rare metals have radioactivity.
某些稀有金属具有放射性。