横向
1
Total number of people in an area
5
Large body of water partly enclosed by land
6
Dry land with little rainfall
8
Low area between mountains
纵向
2
Ocean between Americas and Europe/Africa
3
Imaginary line around the middle of Earth
4
Area where water covers the soil
7
Line dividing two countries
9
Flat grassland in tropical regions
10
Body of water surrounded by land