字词 | 氡 |
释义 | ㄉㄨㄥ一种放射性元素,符号 Rn,无色无臭,不易跟其他元素化合,在真空玻璃管中能发萤光 radon, a colourless and odourless radioactive element that is not easy to conduct chemical combination with other elements and can give out a fluorescent light in a vacuum glass tube; symbol: Rn |
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