英语词汇“radon”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	radon
释义	radonradon /ˈreɪdɑn/ noun [uncountable] (symbol Rn) Etymology ETYMOLOGYradon Origin: 1900-2000 radium science, chemistry a radioactive gas that is an element and that can be dangerous in large amounts
随便看	head-on headphones headpiece headquartered headquarters headrest headroom headscarf headset headstand Head Start head start headstone headstrong heads-up head table head-to-head head trip headwaiter headwaters headway headwind headword heady heal

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