noun 下载 🔗分享 河流,水道。 Any channel, either natural or artificial, through which water flows. Examples : "After heavy rain, the local authorities inspected the watercourses to ensure they weren't blocked and causing flooding. " 大雨过后,地方当局检查了河流和水道,确保它们没有被堵塞并引起洪水。 geography environment nature 与AI对话词汇游戏阅读练习