专业英语环境:environment 环境工程: environmental engineering环境保护:environmental protection 环境意识:environmental consciousness/awareness环境问题:environmental issue/problem 环境效应:environmental effect环境污染:environmental pollution 环境要素:environmental elements环境因子:environmental factors 环境化学:environmental chemistry环境生态学:environmental ecology 环境质量:environmental quality环境自净作用:environmental self-purification/self—cleansing水环境:watershed 水体:water body流域:watershed 水质:water quality水资源:water resources 供水:water supply废水:waste water 水处理:water treatment物理性水质指标:physical indicate of water quality 水污染物:water pollutant生物性水质指标: biological water-quality index 水质标准:water quality standard化学性水质指标:chemical water—quality indexDS:dissolved solids BOD:biochemical oxygen demandTDS:total dissolved solids COD:chemical oxygen demandTSS:total