横向
1
Line dividing two countries
4
Largest ocean on Earth
6
Total number of people in an area
7
Height above sea level
9
Low-lying land surrounded by higher ground
纵向
2
Region surrounding the North Pole
3
Distance east or west of prime meridian
5
Piece of land jutting into the sea
8
Large natural stream of water
10
Wearing away of land by water or wind