目的了解黄河兰州段及其一级支流水体中环境激素的分布，追溯环境激素的来源和污染途径。
Objective to assess the level of environmental hormone (EH) in Lanzhou reach of the Yellow River and to find the pollutant sources and pollution routes.
强化一级处理，可以提高城市污水中污染物的去除率。
The intensified first level treatment will enhance the removal rate of the pollutants in urban sewage water.
豆类、瓜类、茄果类、食用菌类样品中硝酸盐没有超过一级标准的，污染较轻。
Nitrate in leguminous, melon and nightshade vegetable was below the level I, which indicated that these vegetable were slightly polluted.
结果种植基地土壤和灌溉水污染等级均属于“清洁”一级。
ResultsThe quality of soil and irrigation water was good, falling in the categories of "clean".
本发明用固体光气代替了一级剧毒性气体――光气，便于准确计量，优化了操作条件，对环境污染小；
The present invention uses solid phosgene, rather than phosgene to result in accurate metering, optimized operation condition and less environmental pollution.
在相同PAFC投加量下，化学生物絮凝工艺对各项污染物的去除效果均显著优于传统的化学强化一级工艺，剩余污泥产量比后者减少10～15%。
Under the same PAFC dosage, the chemical-biological flocculation was superior to the chemically enhanced treatment process and its surplus sludge was less than the latter by 10-15%. ?
叶菜类中硝酸盐含量均超过一级标准，污染指数高达3.50，污染最重；
Nitric nitrogen in greenery vegetable exceed level I standard, pollution index is up to 3.50;
嘉陵江是三峡水库流域面积最大的一级支流，是库区氮磷污染的主要背景输入之一。
Jialing River is the biggest tributary of the Three Gorges Reservoir, and also one of the biggest implicit inputs of TN and TN pollution to it.
概要：《北京市空气重污染应急预案》今天正式发布，市环保局新闻发言人方力表示，空气污染达一级红色预警时，机动车将实行单双号限行。
When a red-alert for air pollution goes into effect, the emergency plan will only allow drivers to use their vehicles every other day on an odd-even license plate system.
概要：《北京市空气重污染应急预案》今天正式发布，市环保局新闻发言人方力表示，空气污染达一级红色预警时，机动车将实行单双号限行。
When a red-alert for air pollution goes into effect, the emergency plan will only allow drivers to use their vehicles every other day on an odd-even license plate system.
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