短语词组短语The river of sand 流沙河river r sand 河拎沙ground river -sand 磨细河砂river terrace sand 河坡沙River Channel Sand Body 河道砂体river mouth sand 河口砂river course sand 河道砂体river mouth sand bars 河口砂坝river channel sand bodies 河道砂体 返回 river sand