求翻译：河流作用于地球表面所形成的各种侵蚀、堆积形态的总称。包括沟谷、侵蚀平原等河流侵蚀地貌和冲积平原、三角洲等河流堆积地貌。研究河流地貌，掌握河流的演变过程，预测河流的变化趋势，对水利、交通、工农业生产和城镇建设，都具有重要意义。是什么意思？

River formed by acting on the Earth's surface a variety of erosion, accumulation form in general. Including the valley, river erosion, erosion features such as plains and flood plains, deltas and other river accumulation landforms. Of the river landscape, to master the evolution of the river, the ri

Rivers in the shape of the Earth's surface, the forces of erosion patterns of accumulation. Including Valley river erosion features such as plains, erosion and bottomlands, 3 Delta piled up landscapes and other rivers. Study of rivers, river landscape evolution of rivers, forecast trends, the water

The rivers function each kind of corrosion, the stack shape which forms in the earth's surface always called.Including run-off ditch, destructional plain stream deposit landforms and so on and so on river erosion landforms and silting alluviation plain, delta.Studies the rivers landform, grasps the

Rivers in the Earth's surface formed by erosion, stacked form collectively. Including valleys, eroded plain of fluvial geomorphology and alluvial plains, deltas, such as accumulation of river topography. Study on fluvial geomorphology, having fluvial evolution process, and forecast trend of rivers,

Rivers in the Earth's surface formed by erosion, stacked form collectively. Including gullies and erosion of plain river erosion landforms, such as accumulation of geomorphology and alluvial plains, deltas, rivers. Study on fluvial geomorphology, having fluvial evolution process, and forecast trend