横向
1
Low area between mountains
3
Largest hot desert in the world
6
Dry land with little rainfall
8
Chain or group of islands
11
Narrow sea inlet between cliffs
纵向
2
Large natural stream of water
4
Area where water covers the soil
5
Wearing away of land by water or wind
7
Land surrounded by water on three sides
9
Region between the two tropic lines
10
Where river meets the sea
12
Cold treeless Arctic plain
13
Large body of water partly enclosed by land