以上来源于: WordNet
Yi river Basin is located in high precipitation area and the river system is asymmetric.
沂河流域地处降雨高值区，水系呈不对称特征。
There is a Yi River here, and on the two sides are Fragrant Mountain and longmen Mountain.
这里有一条伊水，河两岸是香山和龙门山。
One material source of diamond is primary diamond mines and ancient placer in the ancient Yi River upstream in Shandong, the other is the primary diamond mine which may exist in this area.
金刚石的物质来源一是古沂河上游山东的金刚石原生矿和古砂矿，二是本区的可能存在的金刚石原生矿。
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