横向
1
Half of the Earth
5
Deep narrow valley with steep sides
6
Low-lying land surrounded by higher ground
7
Goods sold to another country
12
Body of water surrounded by land
纵向
2
Largest ocean on Earth
3
Height above sea level
4
Large natural stream of water
8
Low area between mountains
9
Ridge of rock or coral near the surface
10
Visual representation of an area
11
Line dividing two countries