英语词汇“radioactivity”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	radioactivity
释义	radioactivity n. the spontaneous disintegration of atomic nucleii, with the emission of usu. penetrating radiation or particles.
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英语词典包含43808条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。