镭射气 léishèqì radon Definitions Defs Origin Strokes Stroke Words Sentences Sents 镭射气 鐳射氣 léishèqì radon a radioactive gas produced by the decay of radium, same as 氡 dōng; used in medicine for cancer treatment Cross-References Same as 氡 dōng
镭射气 鐳射氣 léishèqì radon a radioactive gas produced by the decay of radium, same as 氡 dōng; used in medicine for cancer treatment Cross-References Same as 氡 dōng
