横向
1
Region near the equator
4
Flat grassland in tropical regions
6
Wearing away of land by water or wind
7
Low area between mountains
9
Area where water covers the soil
10
Seasonal heavy rainfall
纵向
2
Imaginary line around the middle of Earth
3
Total number of people in an area
5
Low-lying land surrounded by higher ground
8
Large body of water partly enclosed by land