横向
1
Region surrounding the North Pole
5
Low area between mountains
6
Wearing away of land by water or wind
7
Low-lying land surrounded by higher ground
9
Large area covered with trees
10
Visual representation of an area
11
Chain or group of islands
纵向
1
Largest river in South America
2
Goods sold to another country
3
Large slow-moving mass of ice
4
Largest ocean on Earth
8
Half of the Earth
12
Region near the equator
13
Flat grassland in tropical regions