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bioconcentration factor
ecol.	生物富集因子
water.res., ecol.	生物浓缩系数; 生物富集系数
bioconcentration factor The quotient of the concentration of a chemical in aquatic organisms at a specific time or during a discrete time period of exposure, divided by the concentration in the surrounding water at the same time or during the same period
environ.	生物富集系数 (在特定时间或在离散的时间段，在水生生物中化学物质的浓度商数；在同时或者在同一个时间段，被周边水剂浓度，除得到的商。)