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The propensity of deposit formation on intake valves and combustion chamber of the M111 engine using regular gasoline and gasohol was studied and emissions of regulated pollutants were tested by using AVL DisGas 4000 Light to further investigate the impact of gasoline detergents on vehicle emissions.

在M111发动机台架上研究了普通车用汽油清净剂与车用乙醇汽油（E10）清净剂对进气阀、燃烧室沉积物生成规律的影响，并用AVL DisGas 4000 Light五气分析仪随机检测发动机常规排放物，进一步分析了不同清净剂对发动机排放的影响。

PCBs at the beginning of the land fill were mainly composed of the 3-Cl and 5-Cl compounds. In the late of the land fill, 2-Cl compounds increased significantly. The main factor affecting the PAHs, PCBs contents were microbial degradation and transformation. Analysis of the pollutants source s indicated that PAHs in sludge were mainly derived from the waste water of refinery, coking plant, gasworks, smelt plant and pitch plant.

填埋初期污泥中PCBs主要以3-Cl和5-Cl化合物为主，填埋后期，2-Cl化合物大大增加，占总的PCBs含量的大部分影响PAHs、PCBs含量变化的主要因素是生物对PAHS的降解转化根据污泥中各污染物的含量对污染物进行源解析表明，污泥中PAHs主要来源于炼油厂、炼焦厂、煤气厂、冶炼厂和沥青厂等排放的废水。

The model can be used to select design parameters and predict migration and diffusion of pollutants in goaf.

该模型可进行迁移扩散预测，为设计参数的确定提供基础。

A novel photocatalytic reactor, which can use sun light and graniform photocatalyst, was developed and evaluated. Hydraulics studies show that the actual mean residence time was approximately 1. 5 to 2 times greater than the theoretical mean residence time, which is of great advantage for degrading the pollutants in the reactor, and that the high reaction rate can be obtained by increasing the rotational speed.

设计了一种新型提升式圆盘多相光催化反应器(exalting round-platephotocatalytic reactor，ERPPR)，该反应器的主要特点是能够利用太阳光和粒状催化剂，通过对ERPPR水力学特性的研究发现，该反应器的实际平均水力停留时间约为理论平均停留时间的1.5到2倍，反应器内循环流量与提升桨转速成正比。

In recent years, the harmfulness of lead ions pollutants and analysis has been one of the hot topics.

近年来，环境样品中铅离子的危害性及其分析测定问题成为人们日益关注的热点。

Herein the situation of indoor air pollution in our country and the harmfulness of main pollutants were brief introduced.

简要介绍了我国室内空气污染现状及主要污染物质的危害，并详细阐述了各种主要室内空气污染治理技术和材料的作用原理和用途。

Potential hazardousness of organic pollutants in some drinking water sources in southern Jiangsu was quantitatively e-valuated with the method of multipollutant analysis and evaluation.

以美国EPA建议的多污染物分析与评价系统，对苏南地区部分饮用水源水质的危险度进行了评价。

In order to find the main factors which affect the indoor air quality of newly decorative residences, orderly to prevent and control the diseases and hazardousness caused by indoor air pollutants scientifically and rationally, almost 200 newly decorative residences in Chengdu have been tested in the year of 2007, and these measurement results vs. different seasons, different type of buildings and different ventilation time have been compared and analyzed in detail.

为了掌握影响新装修住宅空气质量水平的主要因索，更加科学合理地预防和控制室内空气污染带来的疾病和危害，对2007年度成都市200余户新装修住宅的室内空气进行了检测，并按照不同季节、房间类型、通风时间进行了详细地比较和分析。

Lead is one of the major heavy metal pollutants in the environmental water system.

铅是环境水体中的主要重金属污染物之一。

Then, it has many chances to encounter heavy metal pollutants from the river.

所以有较高的机会与河川中的重金属等污染物接触

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。