横向
1
Height above sea level
4
Raised area of land, smaller than a mountain
6
Physical features of land
7
Deep narrow valley with steep sides
8
Wearing away of land by water or wind
10
Steep rock face at edge of land
11
Region surrounding the North Pole
12
Ridge of rock or coral near the surface
纵向
2
Total number of people in an area
3
Land surrounded by water on three sides
5
Vast body of salt water
9
Goods sold to another country