横向
1
Imaginary line around the middle of Earth
5
Half of the Earth
6
Seasonal heavy rainfall
8
Deep narrow valley with steep sides
12
Large natural elevation of earth
纵向
2
Visual representation of an area
3
Vast body of salt water
4
Largest river in South America
7
Large slow-moving mass of ice
9
Body of water surrounded by land
10
Flat grassland in tropical regions
11
Region near the equator