横向
1
Largest ocean on Earth
2
Dry land with little rainfall
3
Where river meets the sea
7
Low-lying land surrounded by higher ground
纵向
1
Flat elevated area of land
4
City that is seat of government
5
Large area covered with trees
6
Large natural stream of water
7
Line dividing two countries
8
Cold treeless Arctic plain
9
One of seven major landmasses