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radon ['reidɔn]    添加到生词本 复制网址
基本释义
  • n. 氡
英英解释

  • 　1个名词解释

    1. a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health
      [同] atomic number 86, radon, rn