composite Evaluation of Polluted Degree 污染程度的模糊综合评判
According to national hierarchical standard of heavy metal to appraise vegetables, sanitary standard of food and quality of vegetables, polluted degree of heavy metals has been evaluated.
并参照国家食品卫生标准和蔬菜质量分级标准评价了蔬菜的重金属污染程度。
Dissolved oxygen in water reflects degree of water polluted, it is one of the important indexes in water monitoring.
水中的溶解氧可反映水体受污染的程度，是水质监测的一项重要指标。
Protozoa exits in various wastewater, by whose biological indicator and mechanism we can determine the degree of polluted water and cleanse the wastewater.
原生动物存在于各种污染水体，利用其作为指示生物判断水质污染程度，利用其机能净化污水。
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