横向
1
Large natural stream of water
3
Physical features of land
4
Total number of people in an area
9
Dry land with little rainfall
纵向
2
Wearing away of land by water or wind
3
Region between the two tropic lines
5
Half of the Earth
6
Large slow-moving mass of ice
7
Region near the equator
8
Distance east or west of prime meridian
10
Largest river in South America