二次尘及外来尘浓度贡献占48%；
The contribution FROM secondary dust and outside source dust occupies 48%.
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.
建筑扬尘对贵阳市区较大范围内的PM 10浓度水平均有影响，对整个城区PM 10的年均浓度贡献接近12%。
Construction fugitive dust showed great impact on the ambient PM10 level in Guiyang, and contributed 12% to the annual mean concentration of PM10 over the urban area.
分别考虑了深浅两次沟道区注入杂质在氧化扩散过程中对表面浓度的贡献。
For double channel implantations with different depths, different contributions of the implanted impurities during oxide diffusion to the surface concentrations are studied in the paper.
吸烟室的颗粒物浓度高于无烟室，吸烟对PM 2.5浓度增加有很大的贡献。
In smoking rooms particulate concentrations are higher than those in nonsmoking room, and smoking has a great contribution to the increase of the concentration of PM2.5.
对电喷车的CO和NO排放浓度做算术平均，其绝对值主要由出现频率少的高浓度值所贡献。
The arithmetical mean concentrations of co and NO emissions of EFI cars were calculated and their absolute values were predominantly contributed by high concentrations with low frequency.
用基团贡献模型UNIFAC预测了两相平衡浓度，结果令人满意。
The UNIFAC group contribution model is used for the prediction of the equilibrium data with satisfactory results.
对于非均质岩心，聚合物对驱油效率的贡献大于表面活性剂的贡献，此外还对三元段塞注入的大小和浓度进行了优化。
To heterogeneous core, the contribution of polymer to the displacement efficiency is higher than that of surfactant. The size of the ASP slug and the concentration of chemicals were also optimized.
颗粒物是北京市大气污染的首要污染物，其中交通扬尘对颗粒物浓度的贡献较大。
Particulate matter, a large proportion of road dust, is the chief pollutant of atmosphere pollution in Beijing.
发现K元素浓度分布呈细粒态单峰谱分布，细粒态K富集因子较高，表明了生物质燃烧的主要贡献。
The fine-mode distribution and high enrichment factors of fine aerosols of K indicated its main source of biomass burning.
这表明在建立可适用于高浓度条件下的电解质溶液热力学模型时应考虑离子缔合的贡献。
The simulation results indicate that when constructing molecular thermodynamics models for highly concentrated electrolyte solutions, the contribution of ion association should be considered.
物理稀释作用对水相中污染物浓度降低的贡献相对较小；
The contribution of physical dilution to the water quality recoverability is relatively small;
物理稀释作用对水相中污染物浓度降低的贡献相对较小；
The contribution of physical dilution to the water quality recoverability is relatively small;
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