名词
中文翻译：放射性密度计
同义词：
['radioactivity density meter', 'radioactive density gauge']
例句：
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1. Theradioactive density meter was used to measure the concentration of radioactive materials in the sample.
放射性密度计被用来测量样品中放射性物质的浓度。
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2.The radioactive density meter showed that the sample contained a high level of radioactive material.
放射性密度计显示样本含有高浓度的放射性物质。
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3. The radioactive density meter was used to monitor the radiation levels in the area.
放射性密度计被用来监测该地区的辐射水平。