river bottom
释义
河底：河流的最底部，由沉积物和岩石组成。
例句
1·The river bottom shelves here.
河底从这里呈缓坡倾斜。
2·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。
3·Clear water in this river bottom .
这条河里的水清澈见底。
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