评价结果表明，下庄铀矿田的土壤中天然放射性水平处于正常范围。
The results show that there is a normal level of natural radioactivity of soil in the Xiazhuang granite uranium ore field.
本文总结了全国环境天然放射性水平调查外照射测量的质量保证工作。
This paper summarizes the quality assurance work of external exposure measurement for national survey of environmental natural radioactive level.
中国土壤中天然放射性核素含量调查（1983—1990年）是中国环境天然放射性水平调查研究的一部分。
The survey of natural radionuclide contents in soil in China(1983—1990)is a part of investigation of environmental natural radioactivity level on China.
调查结果表明，上海市各类水体中天然放射性核素浓度属正常本底水平。
The results show that the radioactivity level of varied water bod-ies of the city was within normal natural background.
大理石的天然放射性属于环境本底水平，花岗岩中放射性远远高于大理石产品。
Natural radioactivity in the marble is equal to the environmental level, radioactivity in the granite is much higher than that in marble.
调查结果表明，宁夏回族自治区水体中天然放射性核素浓度属正常本底水平。
The results show that the radioactivity level of varied water bodies of the region was within normal natural background.
调查结果表明，宁夏回族自治区水体中天然放射性核素浓度属正常本底水平。
The results show that the radioactivity level of varied water bodies of the region was within normal natural background.
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