横向
1
Region between the two tropic lines
4
Cold treeless Arctic plain
6
Flat elevated area of land
7
Goods sold to another country
10
Low-lying land surrounded by higher ground
11
Dry land with little rainfall
12
Region near the equator
纵向
2
Large natural elevation of earth
3
Total number of people in an area
5
Height above sea level
8
Seasonal heavy rainfall
9
Large natural stream of water