您要查找的是不是：
- pollution by nitrogen oxides 氮氧化物污染
- Decomposition by heat, producing toxic nitrogen oxides. 受高热分解，产生有毒的氮氧化物。
- Acid rain is rain, snow or fog that is polluted by acid in the atmosphere and damages the environment.Two common air pollutants acidify rain: sulphur dioxide (SO2) and nitrogen oxide (NOX). 我们生活环境里的酸会对我们吃的食物、喝的水以及呼吸的空气产生影响。
- Fast neutrons are also captured by nitrogen. 快中子也可以被氮吸收。
- Choose a car with a 3-way catalytic converter, to reduce nitrogen oxides and hydrocarbons emissions by 90 per cent. 选购带3相催化转化器的汽车，可以将氮氧化物和碳水化合物排放量降低90%25。
- Smog: A form of air pollution produced when sunlight causes hydrocarbons and nitrogen oxides from automotive emissions to combine in a photochemical reaction. 烟雾污染:一种空气污染,由交通工具排放的碳氢和氮氧化合物在阳光的照射下,发生光化学反应而产生。
- 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。
- 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。
- Start with the pollution most cities have, nitrogen oxides and hydrocarbons from tailpipe emissions and smokestack pollutants, mix in the heat and sunlight, and you get ozone. 而制造污染的是汽车尾气和烟囱排出的氮氧化合物和氮氢化合物，它们在高温和阳光下混合，就会产生臭氧。
- The area will be free of pollution by the year 2006. 到2006年，这个地区将没有污染。
- In the spark-ignition engine, recirculating some of the exhaust gas reduces the emission of nitrogen oxides. 在火花点火的发动机中，再循环的一部分废气减少了氧化氮的有害污染物。
- Immediate steps should be taken to prevent pollution by excreta. 要立即采取措施防止排泄物污染。
- One obvious remedy is to reduce emissions of sulfur and nitrogen oxides to the atmosphere. 减少硫氧化物和氮氧化物向大气的排放量是一个有效的治理措施。
- It is the result of sunlight reacting with hydrocarbons and nitrogen oxides in the atmosphere. 它是阳光与大气中的碳化氢和氧化氮作用的结果。
- Sulfur dioxide and nitrogen oxides also cause acidic precipitation, commonly called acid rain. 二氧化硫和氨氧化物引起酸性降雨，常称为酸雨。
- In other words, replacement of the number 8 carbon by nitrogen in the purine ring does not eliminate activity. 换句话说，嘌呤环上第8位碳被氮所取代并不丧失活性。
- 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。
- Nitrogen oxides (NOX.) are produced when fuel is burned at very high temperatures. 氮氧化物（nox）产生于高温下的燃料燃烧。
