横向
1
Flat grassland in tropical regions
5
Where river meets the sea
6
Narrow sea inlet between cliffs
7
Landform where river meets the sea
10
Total number of people in an area
纵向
2
Low-lying land surrounded by higher ground
3
One of seven major landmasses
4
Large natural elevation of earth
8
Large natural stream of water
9
Largest ocean on Earth
11
Body of water surrounded by land