横向
1
Goods sold to another country
2
Body of water surrounded by land
6
Total number of people in an area
8
Goods brought in from another country
纵向
1
Where river meets the sea
3
Mountain that can erupt with lava
4
Flat elevated area of land
5
Landform where river meets the sea
7
One of seven major landmasses
9
Vast body of salt water