横向
1
Dry land with little rainfall
4
Deep narrow valley with steep sides
8
Visual representation of an area
9
Steep rock face at edge of land
10
Area where water covers the soil
11
Low-lying land surrounded by higher ground
纵向
2
Vast body of salt water
3
Ridge of rock or coral near the surface
5
Flat grassland in tropical regions
6
Low area between mountains
7
Cold treeless Arctic plain
12
Distance north or south of equator