多元大气（polytropic atmosphere） 温度(或虚温)随高度呈线性变化的一种模式大气。
最后通过多元逐步回归模型计算出各污染源对南京市大气颗粒物中半挥发性有机物的贡献率。
Lastly the percentage contributions of various pollution sources to SVOCs on airborne particulates in Nanjing city were calculated using multiple regress models.
不同元素的融合组成一个多元化的空间，它既是中西结合的，也是融汇古今的！这样的空间，大气自成！
Different elements form a diversified space, which is the blending of western and eastern culutre, of the ancient and the modern! Such a space is grand in itself!
利用高效液相色谱-紫外检测器测定大气颗粒物中的PAH_s，建立了多元梯度淋洗程序，并选择合适的吸收波长测定出15种美国EPA优先控制的PAH_s。
Meantime, we obtained multiple-unit gradient program and appropriate absorbance wavelength to measure 15 PAH_s with controlled priority listed by the US EPA.
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