横向
1
Mountain that can erupt with lava
3
Steep rock face at edge of land
5
Area where water covers the soil
6
Seasonal heavy rainfall
9
Large natural stream of water
10
Largest hot desert in the world
纵向
2
Land surrounded by water
4
Wearing away of land by water or wind
7
Flat elevated area of land
8
Vast body of salt water
11
Largest ocean on Earth