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同义词： riverbed
以上来源于: WordNet
The river bottom shelves here.
河底从这里呈缓坡倾斜。
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When he was forced to turn sharply to avoid a floating tree branch, the elephant dropped the hat and it fell to the river bottom.
当大象被迫急转弯以避开一根漂浮的树枝时，帽子掉了下来，掉到了河底。
Clear water in this river bottom.
这条河里的水清澈见底。
Mr. Aguilar eventually pulled a young gator from the river bottom, and I snapped a photo.
WSJ: Nicaragua's San Juan River by Boat
Higgins also said Sunday that divers were unable to get to what is apparently the jet's left engine on the river bottom.
CNN: Recorders recovered from Hudson in 'excellent' condition
Through the water he can see ripply sun-designs on the river bottom.
NEWYORKER: Getting Closer
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