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| Terms for subject Environment (5878 entries) |
| seasonal migration (The periodic movement of a population from one region or climate to another in accordance with the yearly cycle of weather and temperature changes) | الهجرة الموسمية | |
| seasonal variation (In time series, that part of the movement which is assigned to the effect of the seasons on the year) | التغير الموسمي | |
| second-hand goods (Goods or products that have been used previously) | سلع مستعملة | |
| secondary biotope (In the case of disruption of an existing biotope, secondary biotope can be created as a compensation and substitute measure for the loss of the natural one) | موطن حيوي ثانوي | |
| secondary education (The years of instruction following elementary school and until the end of high school) | التعليم الثانوي | |
| secondary sector (The part of a country or region's economy that produces commodities without much direct use of natural resources) | قطاع ثانوي | |
| secondary sludge | حمأ ثانوي | |
| secondary treatment (Stage of the process of waste water treatment: following primary treatment by sedimentation, the second step in most wastewater systems in which biological organisms decompose most of the organic matter into a innocuous, stable form) | معالجة ثانوية | |
| secondary waste treatment | معالجة ثانوية للمخلفات | |
| secondary water treatment | معالجة ثانوية, مياه الصرف | |
| sector environmental assessment | تقييم بيئي قِطَاعي | |
| sectoral assessment | تقييم قطاعي | |
| security of installations (Measures, techniques or designs implemented to protect from harm or restrict access to any apparatus, machinery or construction put in place or connected for use) | أمن التجهيزات | |
| sediment (Any material transported by water which will ultimately settle to the bottom after the water loses its transporting power) | ترسيبات - مواد مترسبة | |
| sediment mobilisation (The transport or setting in motion by wind or water of insoluble particulate matter) | تحريك الترسيبات | |
| sediment transport (The movement and carrying- away of sediment by natural agents; especially the conveyance of a stream load by suspension, saltation, solution or traction) | نقل الترسيبات | |
| sedimentary basin (A geomorphic feature of the earth in which the surface has subsided for a prolonged time, including deep ocean floors, intercontinental rifts and elevated and interior drainage basins) | حوض ترسيب | |
| sedimentation (industrial process, The separation of an insoluble solid from a liquid in which it is suspended by settling under the influence of gravity or centrifugation) | ترسيب | |
| sedimentation basin (A basin in which suspended matter is removed either by quiescent settlement or by continuous flow at high velocity and extended retention time to allow deposition) | حوض ترسيب | |
| sedimentation pond | حوض ترسيب |