下游
word C2- lower reaches (of a river)
- lower level
- lower echelon
- downstream
Its characters
From the library
据统计，二十世纪中期以前，黄河每年带到下游的泥沙平均约有十六亿吨，含沙量在世界大河中首屈一指。
另一部分则沉积在下游的河床里。
历史上，黄河下游曾多次改道。
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