横向
1
Mountain that can erupt with lava
5
Low-lying land surrounded by higher ground
7
Large area covered with trees
8
Cold treeless Arctic plain
纵向
2
Large slow-moving mass of ice
3
Visual representation of an area
4
Distance east or west of prime meridian
6
Largest ocean on Earth
9
Flat grassland in tropical regions
10
Flat elevated area of land