Along with building Three Gorges Dam and exploiting the reservoir area, it is very important to strengthen studying environment evolvement of middle and upper reaches of Yangtse River.

随着三峡大坝的兴建和库区的开发，加强对长江中上游环境演变的研究就显得非常重要。

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The cadmium contents of the water-level-fluctuating zone soil of the Three-Gorges reservoirs area in the Yangtse river main stream and its branch-Xiaojiang river are reported.

报道了三峡库区长江干流及小江支流消落带土壤中重金属镉含量背景值调查结果。

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