横向
1
Region surrounding the North Pole
3
Flat grassland in tropical regions
4
Low-lying land surrounded by higher ground
8
Region between the two tropic lines
9
Seasonal heavy rainfall
10
Vast body of salt water
纵向
2
Wearing away of land by water or wind
5
Where river meets the sea
6
Goods brought in from another country
7
Land surrounded by water