横向
1
Cold treeless Arctic plain
3
Distance east or west of prime meridian
5
Wearing away of land by water or wind
6
Height above sea level
7
Land surrounded by water
纵向
1
Region near the equator
2
Area where water covers the soil
4
Flat grassland in tropical regions
8
Steep rock face at edge of land
9
Low-lying land surrounded by higher ground