横向
1
Ridge of rock or coral near the surface
4
Land surrounded by water
5
Tool for finding directions
6
Largest hot desert in the world
7
Cold treeless Arctic plain
8
Large natural stream of water
9
Large natural elevation of earth
12
Low-lying land surrounded by higher ground
纵向
2
Distance east or west of prime meridian
3
Goods sold to another country
10
Wearing away of land by water or wind
11
Flat grassland in tropical regions