The concentration of radio-elements in building materials and its components are important in assessing population exposures, as most individuals spend 80% of their time indoors.
建材及其组件的无线电元素浓度在人口风险评估是重要的，因为大多数人花费80％的时间是在室内。
The concentration of radio-elements in building materials and its components are important in assessing population exposures, as most individuals spend 80% of their time indoors.
建材及其组件的无线电元素浓度在人口风险评估是重要的，因为大多数人花费80％的时间是在室内。
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