河流流经或曾流经的通道；河底的泥土部分,不包括河岸。
河流流经或曾流经的通道；河底的泥土部分,不包括河岸。
河流流经或曾流经的通道；河底的泥土部分,不包括河岸。
The path where a river runs, or where a river once ran; the bottom earthen part of a river, not including the riverbanks.
河流占据(或曾经占据)的河道
a channel occupied (or formerly occupied) by a river
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