横向
1
Goods brought in from another country
5
One of seven major landmasses
6
Imaginary line around the middle of Earth
7
Flat grassland in tropical regions
9
Seasonal heavy rainfall
纵向
2
Land surrounded by water on three sides
3
Region between the two tropic lines
4
Where river meets the sea
8
Land surrounded by water
10
Total number of people in an area
11
Largest hot desert in the world
12
Landform where river meets the sea
13
Largest river in South America