横向
1
Cold treeless Arctic plain
3
Large body of water partly enclosed by land
6
Large area covered with trees
7
Large slow-moving mass of ice
9
Large natural elevation of earth
10
Deep narrow valley with steep sides
11
Largest hot desert in the world
纵向
2
Height above sea level
4
One of seven major landmasses
5
Dry land with little rainfall
8
Steep rock face at edge of land
12
Chain or group of islands
13
Large natural stream of water
14
Half of the Earth