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- Rainwater with light pollution level is easy to purify. 雨水作为一种自然资源，污染轻，处理容易。
- Studies on dynamics of microcystin pollution level in municipal water supplies. 城市供水藻毒素污染水平的动态研究。
- Insulator's pollution level: Normal class is 0, anti-pollution is III level. 绝缘子污秽等级：普通级为0级；防污型为III级；
- Pollution levels fall during nightime. 夜晚的污染程度则会下降。
- Compared with the previous year,the order of the pollution level remained same and the pollution extent is quite close. 与上年相比，污染轻重顺序未变，污染程度相近。
- It shownthat the pollution level of Fen-river Taiyuan section was strong medium and Jinyang lake wasslight. 结果表明：汾河太原段的水质基本属于强中污染，晋阳湖水质属轻污染。
- The organic pollution level is as follows(from high to low): Dasha River,campus pond,reservoir A,and reservoir B. 有机污染的程度由高到低依次为:大沙河、校园池塘、甲水库、乙水库。
- Compared with the previous year, the order of the pollution level remained same and the pollution extent is quite close. 与上年相比，污染轻重顺序未变，污染程度相近。
- The total creepage distance of an insulator shall be not less creepage distance requested by the pollution level for the site. 绝缘子总的爬距应等于或大于由该地区污秽等级所要求的爬距。
- Evaluating the major factors for pollution level, and introducing to the characteristics and control technologies of pollutants. 各别探讨主要影响污染程度之因素;并介绍污染物的特性与控制方法.
- The result showed that phytoplankton,bacteria,ammonia nitrogen and nitrite nitrogen have different pollution level in different water. 通过分析，浮游植物、细菌、非离子氨和亚硝酸盐氮等因子在不同的水体中表现出不同程度的污染。
- Is the water polluted at source or further downstream? 河水是在源头还是在流出之後受到污染的？
- The atmosphere of the city is very much polluted. 那个城市的空气受到严重污染。
- Radioactive monitoring results in river receiving waste of uraniumelement plant are reported.The pollution level and monitoring method are discussed. 本文报告了铀元件厂排污河流的放射性监测结果，并就污染水平和监测方法进行讨论。
- Polluted air hangs over the city. 城市上空被污染的空气所笼罩。
- The tanker sank and the oil polluted the sea. 油轮沉没了，石油污染了海面。
- PP membrane, PVDF membrane and ceramic membrane are compared in air permeability, mass transfer coefficient, pollution level and price. 从膜的透气量、传质系数、膜污染程度和价格四方面,对聚丙烯(PP)、聚偏氟乙烯(PVDF)和陶瓷三种常用微孔膜的性能进行了比较和评估。
- Most rivers are polluted with filthy waste from the factory. 多数河流被该厂所排出的污秽废物所污染。
- They make regular checks on the surrounding area for pollution levels. 他们对周围地区的污染水平进行定期检测。
- Thankfully, the air pollution levels were not especially bad yesterday. 幸好昨天的空气污染水平不是特别严重。
