横向
1
Dry land with little rainfall
5
Largest hot desert in the world
9
Total number of people in an area
10
Low-lying land surrounded by higher ground
纵向
2
Seasonal heavy rainfall
3
Ridge of rock or coral near the surface
4
Large area covered with trees
6
Narrow sea inlet between cliffs
7
Large slow-moving mass of ice
8
Flat grassland in tropical regions