横向
1
Area where water covers the soil
3
Largest hot desert in the world
4
Largest river in South America
8
Landform where river meets the sea
纵向
2
Flat grassland in tropical regions
5
Low area between mountains
6
Large slow-moving mass of ice
7
Low-lying land surrounded by higher ground
9
Land surrounded by water
10
City that is seat of government