横向
1
Total number of people in an area
5
Piece of land jutting into the sea
9
Large natural stream of water
10
Landform where river meets the sea
纵向
2
Goods sold to another country
3
Tool for finding directions
4
Largest river in South America
6
Region surrounding the North Pole
7
Wearing away of land by water or wind
8
Flat elevated area of land