横向
1
Cold treeless Arctic plain
2
Visual representation of an area
5
Wearing away of land by water or wind
7
Region between the two tropic lines
8
Deep narrow valley with steep sides
9
Height above sea level
10
Long-term weather patterns of an area
纵向
2
Seasonal heavy rainfall
3
Landform where river meets the sea
4
Goods brought in from another country
6
Mountain that can erupt with lava
11
Large natural stream of water
12
Steep rock face at edge of land