横向
1
Largest ocean on Earth
4
Area where water covers the soil
5
Largest river in South America
8
Line dividing two countries
纵向
2
Large natural elevation of earth
3
Region near the equator
6
Flat elevated area of land
7
Low-lying land surrounded by higher ground
9
Physical features of land
10
Piece of land jutting into the sea
11
Large area covered with trees