background radioactivity

基本解释

• [能源科学技术]本底放射性

英汉例句

双语例句

• At the surface, radioactivity of the conglomerates is locally as high as 30 X background.
  在地表， 砾岩的局部地段的放射性高达30倍本底值。
• The results showed that the radioactivity levels of each nuclide in Yangtze River water system were still lower than that of background, and did not cause contamination.
  结果表明，各核素均未对长江造成污染，长江水系放射性浓度仍在本底水平。
• 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。

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词组短语

短语

• background natural radioactivity 天然放射性背景
• background d radioactivity 本底放射性
• natural background radioactivity 天然本底放射性
• radioactivity background 放射性本底
• natural radioactivity background 天然放射性本底

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专业释义

能源科学技术

• 本底放射性