横向
1
Region near the equator
5
Imaginary line around the middle of Earth
6
Body of water surrounded by land
7
Flat grassland in tropical regions
8
Large slow-moving mass of ice
12
Wearing away of land by water or wind
纵向
2
Area where water covers the soil
3
Largest ocean on Earth
4
Region surrounding the North Pole
9
Line dividing two countries
10
Steep rock face at edge of land
11
Where river meets the sea
13
Land surrounded by water on three sides