横向
1
Largest ocean on Earth
4
Body of water surrounded by land
5
Total number of people in an area
6
Dry land with little rainfall
10
Large natural stream of water
11
Large body of water partly enclosed by land
14
Large area covered with trees
15
Half of the Earth
纵向
2
Narrow sea inlet between cliffs
3
Imaginary line around the middle of Earth
7
Largest river in South America
8
Steep rock face at edge of land
9
Ridge of rock or coral near the surface
12
Where river meets the sea
13
Landform where river meets the sea