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| Chinese | English |
| 滴滤池 | trickling filter A system of secondary sewage treatment which is similar to self-purification action of streams; it is more accurately a biological oxidizing bed; the effluent is placed on the stones in the bed and microorganisms present consume the solids as a food supply (一个二级污水处理系统，类似水流的自我净化行为；更准确地说是一个生物氧化床；污水被置于池床里的石头上，水中存在的微生物吸食固体物作为食物。) |