横向
1
Flat elevated area of land
5
Vast body of salt water
7
Wearing away of land by water or wind
8
Large natural stream of water
9
Land surrounded by water
10
Distance east or west of prime meridian
纵向
2
Region near the equator
3
Physical features of land
4
Largest ocean on Earth
6
Deep narrow valley with steep sides
11
Low-lying land surrounded by higher ground
12
Large area covered with trees