横向
1
Ocean between Americas and Europe/Africa
4
Low area between mountains
5
Total number of people in an area
7
Wearing away of land by water or wind
8
Vast body of salt water
12
Narrow sea inlet between cliffs
13
Ridge of rock or coral near the surface
纵向
2
Low-lying land surrounded by higher ground
3
Chain or group of islands
6
Long-term weather patterns of an area
9
Mountain that can erupt with lava
10
Where river meets the sea
11
Goods brought in from another country