横向
1
Flat grassland in tropical regions
5
Large slow-moving mass of ice
6
Landform where river meets the sea
7
Body of water surrounded by land
8
Distance north or south of equator
9
Total number of people in an area
15
Seasonal heavy rainfall
纵向
2
Region between the two tropic lines
3
Wearing away of land by water or wind
4
Area where water covers the soil
10
Low-lying land surrounded by higher ground
11
Dry land with little rainfall
12
Land surrounded by water
13
Line dividing two countries
14
Flat elevated area of land