横向
1
Landform where river meets the sea
5
Flat grassland in tropical regions
6
Where river meets the sea
7
Largest hot desert in the world
9
Cold treeless Arctic plain
11
Large natural elevation of earth
12
Physical features of land
纵向
2
Imaginary line around the middle of Earth
3
Land surrounded by water
4
Total number of people in an area
8
Raised area of land, smaller than a mountain
10
Long-term weather patterns of an area
13
Body of water surrounded by land