高能物理专业英语翻译B-3-SCIdict学术词典... ... 加马背景 background， gamma 仪器背景 background， instrument 天然放射性背景 background， natural radioactivity ...
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The results show that the radioactivity level of varied water bod-ies of the city was within normal natural background.
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 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。
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