横向
1
Largest river in South America
4
Raised area of land, smaller than a mountain
5
Wearing away of land by water or wind
6
Long-term weather patterns of an area
7
Physical features of land
纵向
2
Largest ocean on Earth
3
Where river meets the sea
5
Goods sold to another country
8
Land surrounded by water on three sides
9
Flat elevated area of land
10
Large natural elevation of earth
11
Region between the two tropic lines
12
Line dividing two countries