contaminant concentration短语¹⁴⁴⁹⁷²⁺² 基本例句 污染物浓度 The macroscopical and microcosmic kinetics model of degrading organic in the wastewater with low contaminant concentration in the inner circulation fluidized bed biofilm reactor were deduced. 提出了内循环流化床处理低浓度污水的宏观、微观动力学模型。 cnki