radon
noun /ˈreɪdɒn/
/ˈreɪdɑːn/
[uncountable] (symbol Rn)
- a chemical element. Radon is a radioactive gas used in the treatment of diseases such as cancer.
氡（放射性化学元素） 词源early 20th cent.: from radium, on the pattern of argon.
| 词汇 | radon |
| 释义 | radonnoun /ˈreɪdɒn/ /ˈreɪdɑːn/ [uncountable] (symbol Rn)
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