heaviest gaseous element, 1918, from German Radon, from radium (q.v.) + -on suffix of inert gases. The element was identified in radioactive decay of radium. Alternative name niton (from Latin nitens "shining") gained currency in France and Germany.
实用例句
1. Radon is known to be harmful to humans in large quantities.
众所周知，大量的氡会对人体造成伤害。来自柯林斯例句
2. There is an acknowledged risk of lung cancer from radon.
氡被认为有诱发肺癌的危险。来自柯林斯例句
3. Radon is the daughter of radium.
氡是镭的子体.来自《简明英汉词典》
4. But in two dimensions, Radon transform is not local.
但在二维平面上, Radon变换不具有局部性.来自互联网
5. Sections 301 - 311, added in 1988, relate to indoor radon abatement.
