环境:environment环境工程:environmentalengineering环境保护:environmentalprotection环境意识:environmentalconsciousness/awareness环境问题:environmentalissue/problem环境效应:environmentaleffect环境污染:environmentalpollution环境要素:environmentalelements环境因子:environmentalfactors环境化学:environmentalchemistry环境生态学:environmentalecology环境质量:environmentalquality环境自净作用:environmentalself-purification/self-cleansing水环境:watershed水体:waterbody流域:watershed水质:waterquality水资源:waterresources供水:watersupply废水:wastewater水处理:watertreatment物理性水质指标:physicalindicateofwaterquality水污染物:waterpollutant生物性水质指标:biologicalwater-qualityindex水质标准:waterqualitystandard化学性水质指标:chemicalwater-qualityindex物理处理:physicaltreatment过滤:screening生物处理:biologicaltreatment沉淀:sedimentation化学处理:chemicaltreatment气浮:flotation物理化学处理:physical-chemicaltreatment蒸发:evaporation稀释: