横向
1
Total number of people in an area
4
Ridge of rock or coral near the surface
6
Seasonal heavy rainfall
7
Distance east or west of prime meridian
9
Deep narrow valley with steep sides
纵向
1
Land surrounded by water on three sides
2
Physical features of land
3
Wearing away of land by water or wind
5
Distance north or south of equator
8
Line dividing two countries