noun 下载 🔗分享 河床,河道。 The path where a river runs, or where a river once ran; the bottom earthen part of a river, not including the riverbanks. Examples : "The children found interesting rocks and pebbles in the riverbed. " 孩子们在河床上找到了有趣的石头和鹅卵石。 geography geology environment nature 与AI对话词汇游戏阅读练习