横向
1
Wearing away of land by water or wind
5
Line dividing two countries
6
Height above sea level
8
Flat grassland in tropical regions
9
Total number of people in an area
10
Physical features of land
11
Region between the two tropic lines
纵向
2
Landform where river meets the sea
3
Tool for finding directions
4
Region surrounding the North Pole
7
Large natural elevation of earth