横向
1
Distance north or south of equator
5
Where river meets the sea
6
Seasonal heavy rainfall
7
Wearing away of land by water or wind
8
Region surrounding the North Pole
纵向
2
Flat grassland in tropical regions
3
Ridge of rock or coral near the surface
4
Large body of water partly enclosed by land
8
Height above sea level
9
Largest ocean on Earth
10
Largest river in South America