横向
1
Largest hot desert in the world
4
Steep rock face at edge of land
6
Line dividing two countries
7
Large natural elevation of earth
8
Goods brought in from another country
9
Largest river in South America
12
Low-lying land surrounded by higher ground
纵向
2
Total number of people in an area
3
Region between the two tropic lines
5
Large natural stream of water
10
Large slow-moving mass of ice
11
Seasonal heavy rainfall