The background of changes in Weihe river course is explained. And it laid a foundation for the article to write.
通过对这一部分的介绍,确立了全文的研究对象、研究思路,说明了渭水河道变迁的背景,为全文的写作奠定了基础。
参考来源 - 历史时期关中平原的渭水河道变迁·2,447,543篇论文数据，部分数据来源于NoteExpress
行人莫问当年事，故国东来渭水流。
但是从目前研究状况看，甚少见到黄河流域的石刀研究，渭水流域关于石刀研究的文章几乎空白。
But from study condition to see currently, very few see the stone knife of Yellow River valley research, the Wei river current area article concerning stone knife research almost blank.
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