横向
1
Goods sold to another country
4
Cold treeless Arctic plain
7
Landform where river meets the sea
8
Distance north or south of equator
9
Region near the equator
11
Flat grassland in tropical regions
纵向
2
Large slow-moving mass of ice
3
Ocean between Americas and Europe/Africa
5
Largest river in South America
6
Large body of water partly enclosed by land
10
Narrow sea inlet between cliffs
12
Total number of people in an area
13
Land surrounded by water on three sides