横向
1
Cold treeless Arctic plain
4
Large natural elevation of earth
5
Physical features of land
6
Large natural stream of water
7
Where river meets the sea
8
Flat grassland in tropical regions
10
Wearing away of land by water or wind
纵向
2
Height above sea level
3
Land surrounded by water
4
Visual representation of an area
5
Region near the equator
9
Large area covered with trees
11
Low area between mountains
12
Flat elevated area of land