radon
'reidɒn
基本解释
n. 氡
[化] 氡Rn
英文释义
n. 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
上一个单词：radomir
下一个单词：radon chloride