横向
1
Largest ocean on Earth
5
Dry land with little rainfall
6
Low area between mountains
9
Mountain that can erupt with lava
10
Region surrounding the North Pole
11
Ridge of rock or coral near the surface
纵向
2
Imaginary line around the middle of Earth
3
Region between the two tropic lines
4
Vast body of salt water
7
Land surrounded by water
8
Large body of water partly enclosed by land
12
Large area covered with trees