横向
1
Largest river in South America
5
Wearing away of land by water or wind
6
Steep rock face at edge of land
8
Flat grassland in tropical regions
10
Where river meets the sea
纵向
2
Mountain that can erupt with lava
3
Large natural elevation of earth
4
Land surrounded by water on three sides
7
Height above sea level
9
Narrow sea inlet between cliffs