横向
1
Land surrounded by water on three sides
7
Dry land with little rainfall
8
Long-term weather patterns of an area
9
Largest river in South America
10
Cold treeless Arctic plain
11
Large body of water partly enclosed by land
12
Chain or group of islands
纵向
1
Flat elevated area of land
2
Vast body of salt water
3
Land surrounded by water
4
Total number of people in an area
5
Deep narrow valley with steep sides
6
Large natural elevation of earth
13
Half of the Earth