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

• 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。
• 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。
• Radioactivity provides an extremely sensitive method of analysis since disintegration of individual nuclei are monitored.
  因此放射现象可以监视每一个核的裂变，因此放射现象提供了一个极灵敏的分析方法。
• Detects the presence of radio signals or radioactivity.
  探测无线电信号或放射能的存在。
• 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。
• ( combining form) indicating radiation or radioactivity.
  （化和形式）指示放射或放射能的。
• 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。
• Potassium iodide can be used to counteract radioactivity.
  碘化钾可以用于阻碍辐射损害。
• 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。
• 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。