横向
1
Largest ocean on Earth
3
Largest river in South America
7
Area where water covers the soil
8
Large natural elevation of earth
9
Tool for finding directions
10
Low area between mountains
纵向
2
Mountain that can erupt with lava
4
Landform where river meets the sea
5
Ridge of rock or coral near the surface
6
Flat grassland in tropical regions
11
Vast body of salt water
12
Piece of land jutting into the sea