音標(biāo)發(fā)音英式音標(biāo) [?re?.d?n]美式音標(biāo) [?re?.dɑ?n]英式發(fā)音 美式發(fā)音 基本解釋n.氡同根派生 radon相關(guān)詞英漢例句用作名詞 (n.)Radon is the daughter of radium.氡是鐳的子體。Where does the indoor radon come from?室內(nèi)氡氣是從哪里而來?radon更多例句英英字典劍橋英英字典 a chemical element that is a radioactive gas formed when radium decays and found naturally in rock and soilradon劍橋字典radon柯林斯字典