横向
1
Land surrounded by water
4
Raised area of land, smaller than a mountain
5
Large area covered with trees
7
Large body of water partly enclosed by land
8
Where river meets the sea
10
Low area between mountains
11
Largest river in South America
纵向
2
Cold treeless Arctic plain
3
Chain or group of islands
6
Ridge of rock or coral near the surface
9
Total number of people in an area