横向
1
Flat grassland in tropical regions
5
Ocean between Americas and Europe/Africa
7
Cold treeless Arctic plain
8
Flat elevated area of land
9
Land surrounded by water on three sides
10
Goods brought in from another country
11
Large natural stream of water
纵向
2
Largest river in South America
3
Large natural elevation of earth
4
Distance north or south of equator
6
Low area between mountains