横向
1
Long-term weather patterns of an area
4
City that is seat of government
5
Wearing away of land by water or wind
8
Low-lying land surrounded by higher ground
10
Region surrounding the North Pole
11
Large area covered with trees
12
Flat grassland in tropical regions
纵向
2
Total number of people in an area
3
Region near the equator
6
Largest hot desert in the world
7
Large slow-moving mass of ice
9
Physical features of land