横向
1
Flat grassland in tropical regions
5
Piece of land jutting into the sea
6
Goods sold to another country
7
Land surrounded by water
9
Largest river in South America
11
Vast body of salt water
12
Goods brought in from another country
13
Large body of water partly enclosed by land
纵向
2
Deep narrow valley with steep sides
3
Total number of people in an area
4
One of seven major landmasses
8
Ridge of rock or coral near the surface
10
Narrow sea inlet between cliffs