横向
1
Region surrounding the North Pole
3
Seasonal heavy rainfall
5
Steep rock face at edge of land
8
Land surrounded by water on three sides
9
Flat elevated area of land
10
Mountain that can erupt with lava
纵向
2
One of seven major landmasses
4
Dry land with little rainfall
6
Largest ocean on Earth
7
Line dividing two countries
11
Wearing away of land by water or wind
12
Large slow-moving mass of ice