background level

常見例句

雙語例句

• The new safety level is about 100 times higher than the background level of dust at ground level.
  新的安全水平比地平麪灰塵背景水平高出一百倍，也比從火山爆發(fā)以來測試飛機在英國上空所測的數(shù)據(jù)要高很多。
• The U.S. Nuclear Regulatory Commission recommends that beyond this background level, the public limit their exposure to less than an additional one millisievert per year.
  美國核琯理委員會建議，在此背景輻射水平之上，公衆(zhòng)每年可多承受不超過1毫希的輻射。
  blog.sina.com.cn
• The new safety level is about 100 times higher than the background level of dust at ground level.
  新安全標準約是地水準平麪塵埃本底水準的100倍，也比自火山噴發(fā)後在英國領空作科學研究的飛機所得的數(shù)據(jù)高很多；

原聲例句

• Critics say the national exam is biased, since it presumes a level of knowledge and cultural background that students from working class families may not have.

權威例句

• The new safety level is about 100 times higher than the background level of dust at ground level.
  ECONOMIST: Volcanoes and air travel: Small eruption in Iceland The
• The background level of tropospheric ozone is inexorably rising as volatile organic compounds are released from burning coal and oil.
  FORBES: Protesters To Target Koch Brothers' Secretive 'Billionaires Caucus'
• Indeed, Warner Marzocchi and Anna Maria Lombardi of the INGV showed that a few hours before the earthquake actually struck modelling would have suggested the chance that a powerful quake would occur within 10 kilometres of L'Aquila within three days rose from one in 200, 000 (the background level) to about one in 1, 000.
  ECONOMIST: An extraordinary manslaughter trial starts in Italy
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