横向
1
Large area covered with trees
4
Line dividing two countries
5
Physical features of land
8
Flat grassland in tropical regions
10
Narrow sea inlet between cliffs
11
Land surrounded by water
13
Long-term weather patterns of an area
纵向
2
Deep narrow valley with steep sides
3
Area where water covers the soil
6
Distance east or west of prime meridian
7
Imaginary line around the middle of Earth
9
Dry land with little rainfall
12
Largest ocean on Earth