横向
1
Region near the equator
5
Where river meets the sea
7
Mountain that can erupt with lava
10
Largest river in South America
纵向
2
Largest ocean on Earth
3
Piece of land jutting into the sea
4
Wearing away of land by water or wind
6
Flat grassland in tropical regions
8
Line dividing two countries
9
Large natural elevation of earth