横向
1
Region between the two tropic lines
5
Low area between mountains
6
Large body of water partly enclosed by land
9
Large natural elevation of earth
10
Flat grassland in tropical regions
纵向
2
Low-lying land surrounded by higher ground
3
Large natural stream of water
4
Mountain that can erupt with lava
7
Largest hot desert in the world
8
Total number of people in an area