横向
1
Large natural stream of water
4
Goods sold to another country
5
City that is seat of government
6
Wearing away of land by water or wind
8
Largest hot desert in the world
10
Largest river in South America
纵向
2
Total number of people in an area
3
Piece of land jutting into the sea
7
Body of water surrounded by land
9
Region near the equator