英语词汇“natural radioactivity”的意思、用法、释义、翻译、读音、例句、短语、词组-英汉翻译词典

单词	natural radioactivity
释义	natural radioactivity freq. 1 spoken 1 un.天然放射性 [网络]自然放射性；是天然放射性；自然放射能
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