英语词汇radioactivity怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	radioactivity
释义	radioactivity/ˌreidiəʊækˈtiviti/n. 1 the spontaneous disintegration of atomic nuclei, with the emission of usu. penetrating radiation or particles 放射现象 2 radioactive substances, or the radiation they emit 放射性物质；放射线；辐射线
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