横向
1
Deep narrow valley with steep sides
2
Large area covered with trees
4
Flat elevated area of land
5
City that is seat of government
7
Height above sea level
8
Dry land with little rainfall
9
Flat grassland in tropical regions
10
Vast body of salt water
纵向
2
Narrow sea inlet between cliffs
3
Largest ocean on Earth
4
Total number of people in an area
6
Large natural stream of water
11
Land surrounded by water on three sides
12
Region between the two tropic lines
13
Region surrounding the North Pole