- contaminationcontamination 水污染
contamination control 污染控制；污染管制
soil contamination 土壤污染
bacterial contamination 细菌污染
oil
- pollutionpollution control 水污染控制；水污染防治
atmospheric pollution 大气污染
soil pollution 土壤污染
indoor air pollution 空内空气污染
- soilconservation 土壤保持
water and soil conservation 水土保持
soil layer 土层；土壤层次
frozen soil 冻土
soil pollution 土壤污染
- soils and soil conservation 水土保持
soil layer 土层；土壤层次
frozen soil 冻土
soil pollution 土壤污染
fertile soil
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