横向
1
Imaginary line around the middle of Earth
5
Line dividing two countries
6
Where river meets the sea
7
Wearing away of land by water or wind
8
Goods brought in from another country
11
Low-lying land surrounded by higher ground
纵向
2
Tool for finding directions
3
Piece of land jutting into the sea
4
Large natural stream of water
7
Goods sold to another country
9
Area where water covers the soil
10
Largest river in South America