横向
1
Wearing away of land by water or wind
4
City that is seat of government
6
Tool for finding directions
7
Landform where river meets the sea
8
Flat grassland in tropical regions
10
Long-term weather patterns of an area
纵向
2
Raised area of land, smaller than a mountain
3
Largest hot desert in the world
5
Large natural elevation of earth
9
Goods sold to another country
11
Physical features of land
12
Large area covered with trees
13
Region near the equator