横向
1
Largest river in South America
5
Land surrounded by water on three sides
6
Seasonal heavy rainfall
7
Goods sold to another country
9
Large slow-moving mass of ice
纵向
2
Deep narrow valley with steep sides
3
Flat elevated area of land
4
Low-lying land surrounded by higher ground
6
Large natural elevation of earth
8
Imaginary line around the middle of Earth