横向
1
Land surrounded by water
4
Low area between mountains
5
Large body of water partly enclosed by land
6
Large natural elevation of earth
7
Vast body of salt water
9
Flat grassland in tropical regions
10
Goods sold to another country
13
Land surrounded by water on three sides
纵向
2
Total number of people in an area
3
Flat elevated area of land
8
Ocean between Americas and Europe/Africa
11
Seasonal heavy rainfall
12
Distance east or west of prime meridian