横向
1
Low-lying land surrounded by higher ground
4
Cold treeless Arctic plain
5
Imaginary line around the middle of Earth
6
Height above sea level
纵向
2
Ocean between Americas and Europe/Africa
3
Long-term weather patterns of an area
7
Goods sold to another country
8
Dry land with little rainfall
9
Physical features of land
10
Goods brought in from another country