横向
1
Flat grassland in tropical regions
5
Area where water covers the soil
6
Land surrounded by water
7
Large body of water partly enclosed by land
11
Deep narrow valley with steep sides
纵向
2
Low-lying land surrounded by higher ground
3
Landform where river meets the sea
4
Total number of people in an area
8
Body of water surrounded by land
9
Largest hot desert in the world
10
Chain or group of islands