... 天然放射性本底 natural radioactive background 然放射性高本底地域 HBRA 放射性高本底地区 high background radiation area ...
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... 海水污染物背景值 sea water pollutant background 天然放射性背景值 natural radioactive background 土壤元素背景值 background value of soil element ...
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... 反射本领反射比 reflecting power 天然放射本底 natural radioactive background 漫反射本领漫反射率 diffuse-reflecting power ...
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Two test methods, natural radioactive background method and decay method, used to verify the detection limit of radioactive aerosol monitors are studied.
研究了放射性气溶胶监测仪的检测方法,即天然本底检测法和衰变检测法。
For most people more than half of their natural background radiation dose comes from radon, a radioactive gas that can accumulate in homes, schools and workplaces.
对大多数人来说,他们自然环境辐射剂量的一半以上来自氡—一种可聚集在家庭、学校和工作场所的放射性气体。
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