Objective to investigate impact of coal-burning air pollution on respiratory system among primary and middle school students, and to provide evidence for the prevention and control of air pollution.
目的探讨煤烟型大气污染对中小学生呼吸系统健康的影响，为大气污染的预防控制提供依据。
Burning gas, oil and coal creates air pollution.
燃烧可燃气体、石油和煤炭会产生空气污染。
In Ulan Bator, the air pollution is mainly related to the burning of coal, wood and everything else for heating, cooking, and electricity generation.
乌兰巴托空气污染的主要原因是燃烧煤、木材和其它所有用于加热、做饭和发电的材料。
Even as a growing number of coal-burning power plants around the nation have moved to reduce their air emissions, many of them are creating another problem: water pollution.
即使全国各地的火力发电厂已经开始行动减少空气污染物的排放，但是却带来另一个问题——水质污染。
In our daily life, burning gas, oil and coal also creates air pollution.
在我们的日常生活中，燃烧天然气，石油和煤炭也造成了空气污染。
Residential wood and coal burning for space heating is an important contributor to air pollution, especially in rural areas during colder months.
通过烧柴和燃煤为住宅供暖也是空气污染的一项重要贡献因素，尤其是在较冷月份时的农村地区。
Air pollution from coal-burning power plants and from millions of cars and other vehicles results in smog, or foggy pollution.
来自燃煤电厂和数以百万记的汽车和其它交通工具的空气污染共同导致了烟雾和雾霾等污染的产生。 。
In 1968 its amendment ordered industries burning coal, gas or other fuels to use tall chimneys. The higher the chimney, the better the dispersal of the air pollution.
1968年，《清洁空气法》修正案要求烧煤和天然气等其他燃料的工厂必须使用高烟囱。烟囱建得越高，空气污染就能更快地驱散。
Reduction of NOX emission in burning coal is an important subject to prevent air pollution.
降低煤燃烧过程中NOX的排放是当前防止大气污染的一项重要内容。
The fume discharged from coal-burning boilers makes an important distribution to the air pollution.
燃煤锅炉排出的烟气是形成大气污染的一个重要因素。
The study in this paper was focused on the emission and control of PAHs from coal burning, which was generally thought as one of key components of air pollution.
本文将对煤燃烧过程多环芳烃生成机理和高温控制进行研究，并得到了一些有价值的结论。
As a source of cleaner energy, the natural gas is able to reduce the air pollution by burning coal.
天然气作为一种清洁能源，能够减少燃煤造成的大气污染。
In light of the natural gas production regions, there is severe air pollution in Lanzhou and Xining, especially the smoke pollution emitted from coal burning.
而从天然气消费区来看，兰州和西宁两市大气污染严重，均为煤烟型污染。
Air pollution in winter in Urumqi is the typical coal-burning pollution.
乌鲁木齐市冬季大气污染是典型的“煤烟型”污染。
The type of air pollution in Yinchuan is coal-burning pattern.
银川市空气污染类型为煤烟型污染。
There are two main reasons for air pollution: First, the coal burning boiler emissions, like dust, sulfur dioxide and nitrogen oxides;
造成大气污染的主要原因有两个：一是燃煤锅炉排放的烟尘、二氧化硫和氮氧化物；
There are two main reasons for air pollution: First, the coal burning boiler emissions, like dust, sulfur dioxide and nitrogen oxides;
造成大气污染的主要原因有两个：一是燃煤锅炉排放的烟尘、二氧化硫和氮氧化物；
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