长江中上游地区 upper-middle reaches of yangtze river
长江上中游与汉江流域 in upper-and mid-reaches of yangtze river valley and hanjiang river valley
长江中上游地区马尾松林的分布非常广泛。
The distribution of Masson Pine forest is very wide in the upper ana middle reaches of Yangtse River.
阳山金矿位于长江中上游水土保持区内，属甘肃省管辖。
Yangshan gold deposit lie in depressed area of Gansu province.
严重的泥沙淤积，反映出长江中上游地区土壤侵蚀十分强烈。
Serious silt accumulation reflects the intensive soil erosion in the upper and middle Yangtze River.
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