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。
Chongqing is an economic center of the upper reaches of the Changjiang River, and includes 78.9% counties of the Three Gorges reservoir area.
重庆是长江上游的经济中心，三峡库区有78.9%的区县在重庆境内。
Lying on the lower section of the upper reaches of the Yangtze River, the Three Gorges Reservoir Area consists of submerged portions and resettlement related counties and cities.
三峡水库位于长江上游下段，受回水影响的水库淹没区和移民安置涉及的县市称为库区。
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