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-现代词典

单词	radon
释义	radon noun uncountable chemistry UK /ˈreɪdɒn/ DEFINITIONS1 1 a chemical element that is a rare radioactive gas. Its symbol is Rn. Synonyms and related words Radioactivity and radiation alpha particle atomic becquerel Synonyms and related words Gases acetylene ammonia argon Synonyms and related words Chemical elements actinium alkali metal aluminium radon noun uncountable chemistry US /ˈreɪdɑn/ DEFINITIONS1 1 a chemical element that is a rare radioactive gas. Its symbol is Rn. Synonyms and related words Radioactivity and radiation alpha particle atomic becquerel Synonyms and related words Gases acetylene ammonia argon Synonyms and related words Chemical elements actinium alkali metal aluminum
随便看	a transfer of power/authority a traveling companion a treat at rest a trifle at right angles to/at a right angle to a trip/walk down memory lane at risk at-risk atrium atrocious atrocity atrophy at short notice at-sign at someone’s beck and call at someone’s bidding at someone’s convenience at someone’s earliest convenience at someone’s elbow at someone’s expense at someone’s heels at someone’s insistence at someone’s invitation/at the invitation of someone at someone’s request/at the request of someone

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