横向
1
Line dividing two countries
3
Largest ocean on Earth
5
Total number of people in an area
7
Piece of land jutting into the sea
8
Dry land with little rainfall
纵向
2
Cold treeless Arctic plain
3
Flat elevated area of land
4
Half of the Earth
6
Deep narrow valley with steep sides
9
Large natural elevation of earth
10
Region surrounding the North Pole
11
Narrow sea inlet between cliffs