此次普查的目标在于弄清楚全国污染源的数量、区域和地理分布。
The survey is aimed at determining the number, sector and geographical distribution of the country's polluters in the country.
文章论述了我国地区性土（黄土、红土和胀缩土）的地理分布和工程地质特性，分析了各类地区性土的物质成分和微结构特征以及它们的区域性变化规律。
The geographic distribution of regional soils such as loess soil, laterite soil andexpansive soil in China and their special engineering properties are briefly described in this paper.
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