横向
1
Wearing away of land by water or wind
5
Body of water surrounded by land
6
Large natural elevation of earth
7
Land surrounded by water on three sides
8
Large area covered with trees
纵向
2
Flat elevated area of land
3
Largest river in South America
4
Raised area of land, smaller than a mountain
5
Distance east or west of prime meridian
9
Physical features of land