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| English | Arabic |
| residual amount of water Amount of water left in a water course after it has fed a hydropower plant in order to maintain a satisfactory dry-weather-flow for allowing the survival of biotic communities | الكمية المتبقية من الماء |
| residual pesticide A pesticide remaining in the environment for a fairly long time, continuing to be effective for days, weeks, and months | بقايا المبيدات الحشرية |
| residual risk Remaining potential for harm to persons, property or the environment following all possible efforts to reduce predictable hazards | بقايا الخطر |
| residual waste Material left after any waste treatment process, including industrial, urban, agricultural, mining or other similar treatments | بقايا المخلفات |
| residual waste sludge The excess, unusable semi-solids or sediment resulting from a wastewater treatment or industrial process | بقايا الوحل المستهلك |