横向
1
Height above sea level
5
Vast body of salt water
6
Low area between mountains
10
Largest ocean on Earth
11
Region between the two tropic lines
13
Largest river in South America
14
Steep rock face at edge of land
15
Land surrounded by water on three sides
纵向
2
Large natural elevation of earth
3
Raised area of land, smaller than a mountain
4
Large natural stream of water
7
One of seven major landmasses
8
Large slow-moving mass of ice
9
Cold treeless Arctic plain
12
Long-term weather patterns of an area