横向
1
Land surrounded by water on three sides
6
Ocean between Americas and Europe/Africa
8
Half of the Earth
10
Flat grassland in tropical regions
纵向
2
Deep narrow valley with steep sides
3
Imaginary line around the middle of Earth
4
Distance north or south of equator
5
Cold treeless Arctic plain
6
Region surrounding the North Pole
7
Large natural elevation of earth
9
Height above sea level
11
Flat elevated area of land