横向
1
Chain or group of islands
6
Flat grassland in tropical regions
7
Ocean between Americas and Europe/Africa
纵向
2
Deep narrow valley with steep sides
3
Largest hot desert in the world
4
Land surrounded by water on three sides
5
Largest ocean on Earth
8
Cold treeless Arctic plain
9
Vast body of salt water
10
Raised area of land, smaller than a mountain
11
Largest river in South America