the northern regions of Huai river

• 淮北地区

the northern regions of Huai river的用法和样例：

例句

1. Citing the agricultural economy of Northern Song and Jin dynasties as examples, this paper discusses the societal and economic ups and downs in the northern Huaihe area.
   摘要文章以北宋和金朝时期农业经济为例，论述了淮北地区社会经济的盛衰变迁。