Colluvial deposits at the foot of valley slopes usually affect only narrow strips of valley bottom.
河谷坡脚处的崩积体通常只影响到谷底较窄的地带。
The deep troughs on the Three Gorges valley bottom are formed by river downcutting along the structurally zones on the background of regional tectonic uplift.
结果表明：（1）三峡坝区河谷深槽是在三峡地区构造抬升过程中，水流顺构造裂隙强烈侵蚀下切而形成的；
We found a clear dichotomy between household strategies in the valley bottom and the mountain areas, with significantly lower household income in the mountains.
在同一流域内，山区农户的收入远不及坝区高， 两地的家庭生计策略大相径庭；
We found a clear dichotomy between household strategies in the valley bottom and the mountain areas, with significantly lower household income in the mountains.
在同一流域内，山区农户的收入远不及坝区高， 两地的家庭生计策略大相径庭；
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