横向
1
Large natural stream of water
3
Largest river in South America
4
Flat elevated area of land
5
Region between the two tropic lines
7
Landform where river meets the sea
8
Half of the Earth
纵向
2
Distance north or south of equator
3
Height above sea level
6
Ridge of rock or coral near the surface
9
Area where water covers the soil
10
Wearing away of land by water or wind