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| Arabic | English |
| معامل الانبعاث | emission factor The relationship between the amount of pollutants produced to the amount of raw materials processed, or fuel consumed, in any polluting process |
| معامل التركيز الحيوي | 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 |
| مقارنة النتائج بين عدة معامل | interlaboratory comparison Tests performed at the same time in different laboratories to validate the quality of the results |