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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

    • 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。
    • There is concern about the amount of radioactivity being released into the environment.
      人们对释放进环境的辐射量表示不安。
    • Detects the presence of radio signals or radioactivity.
      探测无线电信号或放射能的存在。
    • 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。
    • ( combining form) indicating radiation or radioactivity.
      (化和形式)指示放射或放射能的。
    • Radioactivity is a special quality of radium.
      放射性是镭的一种特性。
    • 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。
    • 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。
    • 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。
    • 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。