横向
1
Low area between mountains
4
Region between the two tropic lines
5
Largest hot desert in the world
6
Large natural elevation of earth
7
Largest river in South America
纵向
2
Ocean between Americas and Europe/Africa
3
Goods sold to another country
7
Height above sea level
8
Largest ocean on Earth
9
Ridge of rock or coral near the surface
10
City that is seat of government