background radioactivity

基本解释

• [能源科學技術]本底放射性

英汉例句

雙語例句

• At the surface, radioactivity of the conglomerates is locally as high as 30 X background.
  在地表， 礫巖的侷部地段的放射性高達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.
  結果表明，各核素均未對長江造成汙染，長江水系放射性濃度仍在本底水平。
• The results show that the radioactivity level of varied water bod-ies of the city was within normal natural background.
  調查結果表明，上海市各類水躰中天然放射性核素濃度屬正常本底水平。

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词组短语

短語

• 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

能源科學技術

• 本底放射性