radon 的定义
Chemistry.
- a chemically inert, radioactive gaseous element produced by the decay of radium: emissions produced by outgassing of rock, brick, etc. are a health hazard.Symbol: Rn; atomic number: 86; atomic weight: 222.
更多radon例句
- With federal assistance, Florida has acted on the recommendations of dozens of local health departments to investigate environmental pollution, like groundwater contamination or radon levels in the air.