横向
1
Land surrounded by water
3
Largest river in South America
8
Where river meets the sea
纵向
2
Vast body of salt water
4
Area where water covers the soil
5
Cold treeless Arctic plain
6
Seasonal heavy rainfall
7
Flat grassland in tropical regions
Land surrounded by water
Largest river in South America
Where river meets the sea
Vast body of salt water
Area where water covers the soil
Cold treeless Arctic plain
Seasonal heavy rainfall
Flat grassland in tropical regions