横向
1
Cold treeless Arctic plain
6
Distance north or south of equator
7
Region near the equator
8
Piece of land jutting into the sea
9
Distance east or west of prime meridian
11
Low-lying land surrounded by higher ground
12
Largest ocean on Earth
纵向
2
Dry land with little rainfall
3
Ridge of rock or coral near the surface
4
Total number of people in an area
5
Flat grassland in tropical regions
10
Large natural elevation of earth