横向
1
Flat grassland in tropical regions
2
Dry land with little rainfall
4
Raised area of land, smaller than a mountain
5
Large area covered with trees
7
Largest river in South America
11
Line dividing two countries
纵向
2
Landform where river meets the sea
3
Seasonal heavy rainfall
6
Where river meets the sea
8
City that is seat of government
9
Long-term weather patterns of an area
10
Large slow-moving mass of ice
12
Large natural stream of water