valley river basin 河流的干流和支流所流过的整个区域
Both these cities lie in the Yangtze River basin and so the descending monsoon air warms and dries as it moves into the valley.
这两个城市都在长江流经的盆地，当下沉的季风进入谷中，空气会很温暖和干燥。
Weihe river and its tributaries running through them, and gully formation of the canyon and white basin with the river valley.
渭河及其支流横贯其中，形成宽谷与峡谷相间的盆地与河谷阶地。
Before the Western Zhou Dynasty, the connection between Huaihe River valley and the Hanshui River basin were not significant.
西周以前，淮河流域和汉水流域间缺乏密切联系。
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