横向
1
One of seven major landmasses
6
Largest river in South America
7
Flat grassland in tropical regions
8
Large body of water partly enclosed by land
9
Wearing away of land by water or wind
10
Raised area of land, smaller than a mountain
纵向
2
Goods sold to another country
3
Large area covered with trees
4
Piece of land jutting into the sea
5
Region between the two tropic lines
11
Where river meets the sea