横向
1
Chain or group of islands
3
Visual representation of an area
6
Large area covered with trees
7
Land surrounded by water on three sides
11
Low area between mountains
12
Ridge of rock or coral near the surface
纵向
2
Where river meets the sea
3
Large natural elevation of earth
4
Large body of water partly enclosed by land
5
Wearing away of land by water or wind
8
Vast body of salt water
9
Largest ocean on Earth
10
Cold treeless Arctic plain
13
Long-term weather patterns of an area