They accumulated a large amount of river mud for fertilizer.
他们堆积了大量河泥用作肥料。
More and more mud and dust are being washed down into the river each year.
每年越来越多的泥土和灰尘被冲进进河里。
The channel of the river will fill up with mud if not regularly dredged.
河道如果不定期疏浚，就会积满淤泥。
The deposition of mud and sand in the river often causes us much trouble.
泥沙在河中沉积常给我们带来许多麻烦。
We're dredging (up) mud (from the river bed).
我们正在(从河床)挖淤泥。
The river is filled up with mud.
小河充满了污泥。
The river is filled up with mud.
小河充满了污泥。
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