In the lower reaches, where the current slows, the natural accumulation of sediment in the riverbed has caused the river to change course often in the past.
在河流下游，由于流速变缓，泥沙(等沉淀物)自然而然地堆积在河床中，曾经造成黄河经常改道。
Natural River Lake in residential construction and acquisition features to developers and real people are of course ideal choice.
在自然河湖边建造和购置水景住宅，对开发商和购房人来说当然都是理想的选择。
Taking the abandoned delta of Huanghe River as a case, this paper analyzed the natural and artificial driving forces of ecosystem degeneration, with the degeneration course investigated.
本文以废黄河三角洲为例，分析了废黄河三角洲生态系统退化的自然和人为应力以及生态系统的退化过程。
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