横向
1
Half of the Earth
6
Large slow-moving mass of ice
7
Height above sea level
8
Deep narrow valley with steep sides
9
Large area covered with trees
纵向
2
Ridge of rock or coral near the surface
3
Low-lying land surrounded by higher ground
4
Largest hot desert in the world
5
Chain or group of islands
10
Flat grassland in tropical regions
11
Vast body of salt water