横向
1
Wearing away of land by water or wind
6
Largest hot desert in the world
7
Physical features of land
8
Cold treeless Arctic plain
9
Narrow sea inlet between cliffs
纵向
2
Vast body of salt water
3
Large natural elevation of earth
4
Long-term weather patterns of an area
5
Total number of people in an area
10
Ridge of rock or coral near the surface