横向
1
Cold treeless Arctic plain
4
Large body of water partly enclosed by land
5
Region between the two tropic lines
6
Vast body of salt water
9
Chain or group of islands
10
Large slow-moving mass of ice
11
Raised area of land, smaller than a mountain
纵向
2
Total number of people in an area
3
Largest hot desert in the world
7
Largest ocean on Earth
8
Large natural stream of water
12
Distance east or west of prime meridian
13
Narrow sea inlet between cliffs