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| Chinese | English |
| 延时曝气系统 | extended aeration system |
| 延期生效 | carry-over effect Effect caused by the successive passages of polluting substances through the different organisms of a food chain (在食物链中污染物质通过不同的生物体的连续过程所引起的效果。) |
| 沙漠蔓延 | desert encroachment |
| 沙漠蔓延 | desert creep |
| 禁止污水蔓延 | sewage spreading prohibition Prohibition of spreading sewage sludge on land to prevent accumulation of toxic heavy metals in excessive quantities (为了防止土地中积累的有毒重金属超量，禁止污水污泥在地上排放。) |