deltas

2 篇文章
Beneath the surface of river deltas and wetlands,
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Beneath the surface of river deltas and wetlands, 河流三角洲和湿地的表面之下

wetlands deltas river surface beneath of the and
they slow down, release their sediment and build deltas.
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they slow down, release their sediment and build deltas. 水流减缓 留下大量泥沙 堆成了三角洲

deltas release sediment slow build their down they and
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