huaihe watershed
淮河流域
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The distinctive position of the Huaihe river as a natural watershed within the four major river system made it more qualified as the dividing line between the south and the north.
淮河在四渎中自然标识特征的突出，使其更有资格成为南北的分界线。
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