横向
1
Low area between mountains
4
Largest ocean on Earth
5
Largest river in South America
8
Low-lying land surrounded by higher ground
9
Flat elevated area of land
纵向
2
Raised area of land, smaller than a mountain
3
Distance east or west of prime meridian
6
Region between the two tropic lines
7
Largest hot desert in the world
10
Land surrounded by water on three sides
11
Chain or group of islands