横向
1
One of seven major landmasses
4
Low-lying land surrounded by higher ground
6
Distance north or south of equator
7
Distance east or west of prime meridian
8
Cold treeless Arctic plain
9
Visual representation of an area
10
Land surrounded by water on three sides
纵向
2
Total number of people in an area
3
Largest ocean on Earth
4
Line dividing two countries
5
Area where water covers the soil
11
Large area covered with trees
12
Large slow-moving mass of ice