横向
1
Region between the two tropic lines
5
Where river meets the sea
7
Flat grassland in tropical regions
11
Long-term weather patterns of an area
纵向
2
Large natural elevation of earth
3
Dry land with little rainfall
4
Distance north or south of equator
6
Wearing away of land by water or wind
8
Largest hot desert in the world
9
Cold treeless Arctic plain
10
Body of water surrounded by land
12
Deep narrow valley with steep sides