横向
1
Goods sold to another country
5
Total number of people in an area
6
Area where water covers the soil
9
Where river meets the sea
10
Region between the two tropic lines
纵向
2
Largest ocean on Earth
3
Body of water surrounded by land
4
Line dividing two countries
7
Largest river in South America
8
Ocean between Americas and Europe/Africa
11
Flat grassland in tropical regions
12
Large natural stream of water