横向
1
Total number of people in an area
3
Large body of water partly enclosed by land
5
Region near the equator
6
Dry land with little rainfall
8
Large area covered with trees
纵向
2
Steep rock face at edge of land
4
Large natural stream of water
5
Cold treeless Arctic plain
7
Line dividing two countries
9
Mountain that can erupt with lava
10
One of seven major landmasses