横向
1
Large natural elevation of earth
6
Wearing away of land by water or wind
7
City that is seat of government
9
Cold treeless Arctic plain
11
Large natural stream of water
纵向
2
Long-term weather patterns of an area
3
Large body of water partly enclosed by land
4
Imaginary line around the middle of Earth
5
Physical features of land
8
Region surrounding the North Pole
10
Goods sold to another country
12
Region near the equator