本文介绍了改进的W值法的评分标准和数学模式，并对两条河流监测数据进行了计算。
This paper introduces a grade standard and mathematical model of the Improved Method of W, with which we evaluate two river's monitoring data.
这14个水质监测站位于流入伊利湖盆地的河流沿岸。
These 14 water-quality monitoring stations are located along the rivers that flow into the Lake Erie basin.
泛美卫生组织和美国疾病预防控制中心的专家共同致力于改进病例监测和报告，分析从河流和其他水源得到的水样，并监测抗生素耐药性。
PAHO and US CDC experts are working together on improved surveillance and reporting of cases, analysis of water samples from rivers and other water sources, and monitoring of antibiotic resistance.
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