This paper expounds the source and distribution of the harmful heavy metal in Chinese environment at present, and probes into how to prevent the harmful heavy metal pollution.
就当前我国环境中有害重金属的来源及分布作了简要阐述，对如何防治重金属污染进行了探讨。
The purpose of researches on urban dust is focused on the source of dust material, composition of dust, distribution, migration and evolution, pollution effects and prevention and cure.
研究城市灰尘的目的是研究其物质来源、物质成分、分布规律、迁移演化、污染效应、防治治理等。
Objective to study distribution of air pollution source, determine the historical exposure concentration of air pollution in the region, and assure the work scope of health investigation.
目的根据区域大气污染源分布研究确定区域大气污染物历史暴露浓度，确定健康调查工作范围。
The paper analyses the diffusion conditions of air boundary layers, the distribution and forecast of source air pollution and the current situation of air pollution.
分析了大气边界层扩散条件、大气污染源分布及预测、大气污染现状。
The study on watershed distribution of agricultural non - point source pollution is important to improve environmental quality.
农业非点源污染的流域分配研究对于提高环境质量具有重要的现实意义。
Safety hazards source presents at not only raw materials, processing, storage, distribution and other sectors, and more importantly, one of the sources is environmental pollution.
安全危害源不仅存在于食品的原料、加工、贮藏、流通等环节，更重要的来源之一是环境污染。
The distribution of pollutant concentration is closely correlated to the distribution of pollution source and the discharge of pollutant.
污染物浓度分布与污染源的空间分布和排放量密切相关。
The distribution of pollutant concentration is closely correlated to the distribution of pollution source and the discharge of pollutant.
污染物浓度分布与污染源的空间分布和排放量密切相关。
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