横向
1
Low area between mountains
3
Region near the equator
6
Region surrounding the North Pole
7
Low-lying land surrounded by higher ground
9
Long-term weather patterns of an area
11
Narrow sea inlet between cliffs
纵向
2
Largest ocean on Earth
4
Raised area of land, smaller than a mountain
5
Largest hot desert in the world
8
Land surrounded by water
10
Ridge of rock or coral near the surface
12
Large natural stream of water