横向
1
Wearing away of land by water or wind
5
Region between the two tropic lines
6
Imaginary line around the middle of Earth
9
Goods sold to another country
10
Flat grassland in tropical regions
12
Flat elevated area of land
纵向
2
Total number of people in an area
3
Land surrounded by water on three sides
4
City that is seat of government
7
Seasonal heavy rainfall
8
Landform where river meets the sea
11
Large area covered with trees