横向
1
Ocean between Americas and Europe/Africa
6
Largest hot desert in the world
7
Ridge of rock or coral near the surface
8
Goods brought in from another country
10
Low-lying land surrounded by higher ground
11
Mountain that can erupt with lava
12
Flat grassland in tropical regions
纵向
2
Vast body of salt water
3
Imaginary line around the middle of Earth
4
Region surrounding the North Pole
5
Region between the two tropic lines
9
Large area covered with trees