横向
1
Ocean between Americas and Europe/Africa
5
Large natural elevation of earth
7
Largest river in South America
8
Body of water surrounded by land
10
One of seven major landmasses
纵向
2
City that is seat of government
3
Flat grassland in tropical regions
4
Low-lying land surrounded by higher ground
6
Goods sold to another country
9
Goods brought in from another country