“natural radiation level”的概念、定义、翻译、参考文献-科学参考

单词	natural radiation level
释义	natural radiation level Encyclopedia 工学天然辐射水平释 natural radiation level天然辐射水平自然存在于地球上的放射性同位素放射和宇宙照射所产生的射线强度。工学人工辐射照射水平释 natural radiation level人工辐射照射水平人类的实践活动引起的人类辐射照射大小及其分布。
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