英语词汇natural radioactivity background怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	natural radioactivity background
释义	natural radioactivity background 简明释义天然放射性本底网络释义 1 ?天然放射性本底 ...atural radioactivity 天然放射性背景 radioactivity background 放射性本底 natural radioactivity background 天然放射性本底 .. 短语 1 natural background radioactivity 天然本底放射性 2 background natural radioactivity 天然放射性背景双语例句 1 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。 2 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。
随便看	voice motor voice multiplex voice multiplexing voice navigation voice-net voice network voice noise voice notes voice numerical control Voice of America Voice of America, the voice of conscience voice-of-god voiceofreason voice of reason voice of the customer voice-only voice onset time voice onset time voice on the net voice-operated voiceoperated voice operated voice-operated anti-singing circuit voice-operated antisinging device

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