在远远大于2米的距离之外，烟草浓度则几乎接近背景浓度。
At distances larger than 2 m, levels near single cigarettes were generally close to background.
两种高CO_2处理和背景浓度均呈现出抽穗期蒸腾速率最大，拔节期次之，分蘖期相对较小的趋势。
Two high concentration of CO_2 processing and background showed the biggest transpiration rate in heading stage, followed by jointing stage, tillering stage relatively small trend.
对样品处理条件、背景吸收干扰、出限及特征浓度进行了考察。
The pretreatment conditions of sample, background absorption interference, the detection limit and characteristic concentration were investigated.
本文还讨论了背景电解质浓度与样品响应值的关系以及各种操作条件的影响。
The effects of composition and concentration of the background electrolyte on the response value of sample etc. were also discussed.
化学背景与异常在统计学上的差异同时表现在浓度和变差两个方面。
Statistically, the difference between background and anomaly is the nature of their concentration and variation.
背景沙漠气溶胶浓度的日变化主要由大气扩散稀释能力控制。
The diurnal variation of concentration of background desert aerosol is mainly controlled by air disperse dilution.
仪器性能参数、颗粒浓度、背景参数等均可自动监测。
Performance parameters of the instrument, particle concentration and background parameters, etc.
在模型中尝试性地将面源污染产生的浓度贡献转化到背景值中计算，简化了解析模型。
In the model the contribution from area pollution sources was calculated by transforming it to the background concentration, so the model was greatly simplified.
低浓度的烷烃背景气体对恶臭的脱除效率基本无影响。
Basically, low concentration of alkane background gas has no effect on the removal efficiency of malodorous gas.
目的了解氯硝西潘对脑电背景活动、样放电的影响，及其与氯硝西潘血清浓度的关系。
Objective To explore the effect of clonazepam (CZP) on background EEG activities and epileptiform discharges, and the relationship between the effects and the serum drug concentration.
结果表明，随着掺硼浓度的增加，电极的电势窗口略微变小，背景电流也随之变大。
The results show that with the increase of the boron dopant density, the potential windows of the electrodes become narrower and the background currents become larger.
背景：假定较低的硒浓度与增加的心血管疾病风险有关，补充硒可以预防冠心病。
Background: it is hypothesized that low selenium concentrations are associated with an increased risk of cardiovascular disease and that selenium supplements prevent coronary heart disease.
研究结果表明，背景气流掠过庭院式建筑，其内部风速和颗粒物浓度可有效降低。
The numerical results indicate that courtyards can effectively reduce its interior wind velocity and particle concentration;
氡的地质潜势是环境氡研究的重要内容，也是从地质背景出发快速评价氡浓度水平的有效方法。
The research of radon geological potential is an important part of environment radon research and an effective approach of fast evaluating radon level from geology.
随沙尘天气强度逐渐加强（即从背景大气到浮尘、扬沙、沙尘暴、强及特强沙尘暴），它们的地面沙尘浓度约按3倍的比率依次递增；
With the intensifying of the dust weathers, the dust thickness, total suspended particulates (TSP) of dust at the surface will increase in geometric series at the rate of 3 times.
随沙尘天气强度逐渐加强（即从背景大气到浮尘、扬沙、沙尘暴、强及特强沙尘暴），它们的地面沙尘浓度约按3倍的比率依次递增；
With the intensifying of the dust weathers, the dust thickness, total suspended particulates (TSP) of dust at the surface will increase in geometric series at the rate of 3 times.
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