1N-UNCOUNT 地形学;地形测量学Topography is the study and description of the physical features of an area, for example its hills, valleys, or rivers, or the representation of these features on maps. 地形学;地形测量学
2N-COUNT [usually singular, with poss]地形;地貌;地势 The topography of a particular area is its physical shape, including its hills, valleys, and rivers. 地形;地貌;地势
The topography of the river's basin has changed significantly since the floods. [+ of]