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词汇
radon
释义
radon音标:[ 'reidɔn ] n.【化学】氡〔由镭裂变后生成的放射性元素,旧名 radium emanation 〕。 radon daughters氡放射性衰变产物〔香烟烟尘中的一种放射性微粒,对被动吸烟者的健康有害〕。
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更新时间:2025/11/18 11:40:54