横向
1
Vast body of salt water
3
Cold treeless Arctic plain
7
Long-term weather patterns of an area
9
Distance north or south of equator
纵向
2
Low-lying land surrounded by higher ground
4
Large slow-moving mass of ice
5
Dry land with little rainfall
6
Wearing away of land by water or wind
8
Raised area of land, smaller than a mountain