横向
1
Largest river in South America
5
Long-term weather patterns of an area
6
Height above sea level
8
Flat elevated area of land
9
Wearing away of land by water or wind
纵向
2
Distance east or west of prime meridian
3
Where river meets the sea
4
Vast body of salt water
7
Largest hot desert in the world
10
Physical features of land