横向
1
Flat grassland in tropical regions
5
Line dividing two countries
6
Dry land with little rainfall
8
Vast body of salt water
9
Largest ocean on Earth
11
Total number of people in an area
纵向
2
Where river meets the sea
3
Height above sea level
4
Physical features of land
7
Piece of land jutting into the sea
10
Mountain that can erupt with lava
12
Low-lying land surrounded by higher ground
13
Land surrounded by water
14
Large natural elevation of earth