R.N.

汉语翻译

英语解释：

名词 r.n.:

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
   同义词：radon, Rn, atomic number 86
2. a graduate nurse who has passed examinations for registration
   同义词：registered nurse, RN