横向
1
Low-lying land surrounded by higher ground
5
Line dividing two countries
6
Largest ocean on Earth
9
Visual representation of an area
11
Long-term weather patterns of an area
纵向
2
Goods brought in from another country
3
Vast body of salt water
4
Deep narrow valley with steep sides
7
Ridge of rock or coral near the surface
8
Where river meets the sea
10
Physical features of land
11
Steep rock face at edge of land