riverbedWiktionary 原文中文来自 ECDICTn.河床构词拆分river词根/词干+bed词根/词干词源说明From river + bed. Compare Dutch rivierbedding (“riverbed”), German Flussbett (“riverbed”), Swedish flodbädd (“riverbed”).释义（英文）名词 Noun(hydrology) The path where a river runs, or where a river once ran; the bottom earthen part of a river, not including the riverbanks.