横向
1
Imaginary line around the middle of Earth
4
Largest hot desert in the world
6
Long-term weather patterns of an area
7
Land surrounded by water on three sides
9
Physical features of land
纵向
2
One of seven major landmasses
3
Region between the two tropic lines
4
Flat grassland in tropical regions
5
Region surrounding the North Pole
8
Total number of people in an area