background concentration

常見(jiàn)例句

The plume of carbon monoxide over the Pacific Ocean is easy to see against the lighter background concentration of the gas over the ocean.
在輕微氣流聚集的太平洋海平麪之上，一氧化碳的菸羽很容易看到。
In the model the contribution from area pollution sources was calculated by transforming it to the background concentration, so the model was greatly simplified.
在模型中嘗試性地將麪源汙染産生的濃度貢獻(xiàn)轉(zhuǎn)化到背景值中計(jì)算，簡(jiǎn)化了解析模型。
To investigate the impact of chamber ambient air quality on the testing results, mathematical analysis is performed to study the vibration trends of formaldehyde background concentration.
爲(wèi)了解氣候艙周邊空氣質(zhì)量對(duì)檢測(cè)結(jié)果的影響，本文應(yīng)用數(shù)學(xué)分析方法對(duì)氣候艙內(nèi)空氣中甲醛本底濃度的變化槼律進(jìn)行了探析。