横向
1
Distance east or west of prime meridian
5
Large natural elevation of earth
7
Half of the Earth
8
Mountain that can erupt with lava
12
Ridge of rock or coral near the surface
纵向
2
Largest river in South America
3
Where river meets the sea
4
Large slow-moving mass of ice
6
Large natural stream of water
9
Distance north or south of equator
10
Flat elevated area of land
11
Wearing away of land by water or wind
13
Large area covered with trees