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pollutant level
tech. 污染物浓度; 污染水平
pollutant levels
auto. 发动机/汽车污染物值数据
desert. 污染物浓度
pollutant level A value representing the concentration of a polluting agent in a specified area, often determined by a measuring and recording device
environ. 污染物水平 (在一个特定的区域代表污染浓度的一个值，通常由测量和记录设备决定。)
pollutant level
: 6 phrases in 3 subjects
Ecology2
Technology3
Water resources1

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