radioactivity

英 [ˌreɪdiəʊæk'tɪvəti]

美 [ˌreɪdioʊæk'tɪvəti]

n.  放射性; 放射(现象)

复数：radioactivities　

CET4CET6TEM4TEM8化学

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。

英英释义

noun

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

双语例句

• People had no idea of radioactivity before Curie discovered redium.
  直到居里夫人发现镭后，人们才了解放射性。
• Radioactivity is a special quality of radium.
  放射性是镭的一种特性。
• A metal called uranium gave off a kind of radiation, which Marie Curie later called radioactivity.
  一种叫铀的金属发出一种射线，后来玛丽·居里把这种现象称为放射性。
• This paper presents basic situation and survey methods of environmental radioactivity in Mongolia and Romania.
  本文介绍了蒙古和罗马尼亚两国环境放射性的基本态势，以及环境放射性调查方法等。
• This conviction was based solely on the atomic nature of radioactivity.
  我们的这种信念完全依赖于原子的放射性属性。
• The ability of radiation to induce radioactivity in food is related to its energy.
  辐照所引起的使食物具有放射性的能力是与辐照的能量有关的。
• This example illustrates the great sensitivity of the radioactivity method.
  这个例子说明了放射性方法很灵敏。
• 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。
• So the concentration of radioactivity in the seawater would still be quite low.
  因此海水中的放射性浓度仍将相当低。
• 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。