淤泥滩和江河入海口处的淤泥是很细的基质，富含有机物质和低的含氧量。

Mudflats and estuarine silts are fine substrates rich in organic matter and low in oxygen.

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淤泥滩和江河入海口处的淤泥是很细的基质，富含有机物质和低的含氧量。

Mudflats and estuarine silts are fine substrates rich in organic matter and low in oxygen.

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