横向
1
Vast body of salt water
3
Low-lying land surrounded by higher ground
5
Ocean between Americas and Europe/Africa
6
Seasonal heavy rainfall
7
Raised area of land, smaller than a mountain
11
Distance north or south of equator
12
Deep narrow valley with steep sides
纵向
2
Cold treeless Arctic plain
4
Large natural elevation of earth
8
Imaginary line around the middle of Earth
9
Mountain that can erupt with lava
10
Region near the equator
13
Area where water covers the soil