横向
1
Deep narrow valley with steep sides
3
Dry land with little rainfall
4
Large natural stream of water
6
Goods sold to another country
8
Distance north or south of equator
10
Low area between mountains
12
Flat elevated area of land
纵向
2
Region between the two tropic lines
5
Imaginary line around the middle of Earth
7
Distance east or west of prime meridian
9
Ridge of rock or coral near the surface
11
Largest hot desert in the world
13
Cold treeless Arctic plain