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- Preventing pollution by automobile emission ? 防治机动车排气污染物污染。
- Preventing pollution by automobile emission? 防治机动车排气污染物污染。
- pollution by chromium 铬污染
- The river has been polluted by waste products from the factory. 这条河已经受到工厂排放的废料的污染。
- Less pollution by decease of film and water waste. 5. 4.;降低废片及废水造成的环境污染。
- The wear resistance of the metastable austenitic Mn-steels can be raised by chromium. 铬可有效提高介稳奥氏体锰钢的耐磨性。
- The area will be free of pollution by the year 2006. 到2006年，这个地区将没有污染。
- Immediate steps should be taken to prevent pollution by excreta. 要立即采取措施防止排泄物污染。
- It was verified that the layer is composed by chromium nitrides precipitates and essentially expanded austenite nitrogen rich and with hardness around 850 HV. 结果证明，等离子氮碳共渗层由氮化铬析出相和富氮奥氏体基体组成，其硬度约850HV；
- Reduces air pollution by minimizing the discharge of unburned hydrocarbon . 将未燃烧的碳氢化合物含量降至最低，减少了空气污染。
- Rice straw is recycled for reuse to avoid creating pollution by burning it. 避免燃烧稻草造成污染，稻草也要回收再利用。
- The fiver has been polluted by factory waste. 这条河流被工厂废物所污染。
- The water was polluted by refuse from the factory. 工厂所排放的废物弄脏了水。
- The air was polluted by factory smoke. 空气被工厂冒的烟污染了。
- The river has been polluted by factory waste. 这条河流被工厂废物所污染。
- The rapid growth of its population,industry and commerce remain at the root of pollution by human activities. 人口激增，工商业蓬勃发展，这些人类活动正是污染的根源。
- This Law shall apply to the prevention and control of pollution by liquid waste and gaseous waste in containers. 液态废物和置于容器中的气态废物的污染防治，适用本法。
- Reducing pollution by, say, 90 percent may be relatively inexpensive for some plants but very costly for others. 减少污染，比如说90%25，对某些工厂相当便宜，而对另外一些工厂却是相当昂贵。
- Sun too penetrates into privies, but is not polluted by them. 阳光也照进厕所,但不会遭到污染。
- The river has been polluted by the waste products from the factory. 从工厂里出来的废物污染了河流。
