横向
1
Largest hot desert in the world
4
Half of the Earth
6
Deep narrow valley with steep sides
8
Low-lying land surrounded by higher ground
10
Height above sea level
11
Large natural stream of water
纵向
2
Long-term weather patterns of an area
3
Largest river in South America
5
Where river meets the sea
7
Line dividing two countries
9
Visual representation of an area
12
Land surrounded by water on three sides
13
Goods brought in from another country
14
Mountain that can erupt with lava