The micromorphology of main kinds of degradated purple soils in the hilly area, Sichuan Basin, have been revealed by contrasting with normal soils and trace researching in the same site.

采用比较研究法和辅以定点追踪观测，研究了四川盆地丘陵区几种主要紫色土退化的微形态特征。

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The diffraction hilly structures widely develop on the top of Middle Triassic and Lower Triassic in the seismic horizontal stacking time sections in the central part of Sichuan Basin.

在四川盆地中部的地震水平叠加时间剖面上，中三叠统及下三叠统顶部广泛发育绕射丘状结构。

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Soil and water erosion in hilly areas of the middle Sichuan Basin is extraordinary seriously in China. This area has an enormous population, but the field is not enough.

川中丘陵区是我国水土流失最为严重的区域之一，人口众多，耕地稀少，土壤侵蚀严重，因此被列入长江上游水土流失重点防治工程的核心区域。

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