横向
1
Physical features of land
4
Low area between mountains
5
Flat grassland in tropical regions
8
Cold treeless Arctic plain
9
Where river meets the sea
纵向
2
Ocean between Americas and Europe/Africa
3
Height above sea level
4
Mountain that can erupt with lava
6
Largest hot desert in the world
7
Distance east or west of prime meridian
10
Large natural stream of water
11
Low-lying land surrounded by higher ground