横向
1
Large area covered with trees
4
Land surrounded by water on three sides
5
Area where water covers the soil
6
Vast body of salt water
10
Total number of people in an area
纵向
2
Where river meets the sea
3
Physical features of land
7
Distance north or south of equator
8
Largest ocean on Earth
9
One of seven major landmasses
11
Visual representation of an area
