riverlyadj.河的；河流的；河边的rivern.河；江；河流；水道river water pollution河流水污染river-bed evolution河床变迁river crossing tunnel过江隧道River Patrol Flotilla江河巡逻纵队river cross-section河流断面river bottom sediment河底沉积River Forecast Center河流预报中心river bank filtration河床渗滤river cascade project河道梯级工程river surface profile河流水面线