横向
1
Large natural stream of water
4
Goods brought in from another country
5
Mountain that can erupt with lava
6
Large natural elevation of earth
8
Total number of people in an area
11
Where river meets the sea
纵向
2
Wearing away of land by water or wind
3
Body of water surrounded by land
7
Tool for finding directions
9
Largest ocean on Earth
10
Flat grassland in tropical regions
12
Large body of water partly enclosed by land