经过技术改造，废水处理系统的各项主要水质指标均达到了国家污水综合排放标准。
Through these technical alterations, the main indexes of water quality of the waste water disposal system met the national comprehensive standards on waste water emmision.
沱江干流的几个主要水质指标与10年前相比呈继续恶化的趋势，干流的水污染仍未得到控制。
The main indexes of water quality in most part of the river were worse than those 10 years ago.
研究表明，水质43.7%的化学需氧量(测量水质有机化合物的主要指标)、67%的含磷量和57%含氮量应归咎于农业。
According to the study agriculture is responsible for 43.7% of the nation's chemical oxygen demand (the main measure of organic compounds in water) 67% of phosphorus and 57% of nitrogen discharges.
研究表明，水质43.7%的国家化学需氧量(测量水质有机化合物的主要指标)、67%的含磷量和57%含氮量应归咎于农业。
According to the study, agriculture is responsible for 43.7% of the nation's chemical oxygen demand (the main measure of organic compounds in water), 67% of phosphorus and 57% of nitrogen discharges.
COD是水质监测的一项重要指标，氯离子是COD测定中主要的干扰物之一。
COD is one of the important indexes in water quality surveillance and chloride is one of the main disturbing substances.
土地利用类型和土地利用强度的差异也能从三个研究区水质主要化学指标的不同得到体现。
The change in the parameters or indicators of karst groundwater quality also reflects the modification of land use types and intensity in the three study regions.
作为游泳池水质的最主要的控制指标细菌和余氯量，在夏季人员爆满之时能否达标显得尤为重要。
The levels of bacteria and residual chlorine, both key indicators for swimming pool water quality have to be controlled carefully, especially in summer time when the basin is full.
作为游泳池水质的最主要的控制指标细菌和余氯量，在夏季人员爆满之时能否达标显得尤为重要。
The levels of bacteria and residual chlorine both key indicators for swimming pool water quality have to be controlled carefully especially in summer time when the basin is full.
本文主要通过给水管道中铁的含量来反映给水管道的腐蚀状况，并从管道腐蚀机理方面分析了各个水质指标对铁稳定性的影响。
This article explains the corrosion status of pipes by the content of irons and analyse each water quality parameters 'influence on the iron stability.
本文主要通过给水管道中铁的含量来反映给水管道的腐蚀状况，并从管道腐蚀机理方面分析了各个水质指标对铁稳定性的影响。
This article explains the corrosion status of pipes by the content of irons and analyse each water quality parameters 'influence on the iron stability.
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