| 单词 | radon |
|---|---|
| 音标 | 英[ˈreɪdɒn] 美[ˈreɪdɑn] |
| 解释 | n.<化>氡（元素符号Rn）; |
| 例句 | N-UNCOUNT 氡 Radon is a radioactive element in the form of a gas. |
| 变形 |
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