横向
1
Cold treeless Arctic plain
4
Steep rock face at edge of land
6
Region near the equator
8
Dry land with little rainfall
9
Large natural stream of water
纵向
1
Region between the two tropic lines
2
Region surrounding the North Pole
3
Land surrounded by water on three sides
5
Distance north or south of equator
7
Ridge of rock or coral near the surface