横向
1
Large area covered with trees
4
Wearing away of land by water or wind
7
Flat elevated area of land
9
Long-term weather patterns of an area
12
Largest river in South America
纵向
2
Mountain that can erupt with lava
3
Physical features of land
5
Low area between mountains
6
Large natural elevation of earth
8
Landform where river meets the sea
10
Half of the Earth
11
Distance east or west of prime meridian