横向
1
Wearing away of land by water or wind
5
Flat elevated area of land
6
Cold treeless Arctic plain
7
Region between the two tropic lines
8
Region near the equator
9
Low area between mountains
10
Height above sea level
纵向
2
Seasonal heavy rainfall
3
Distance north or south of equator
4
Vast body of salt water
6
Physical features of land