横向
1
Low-lying land surrounded by higher ground
3
Landform where river meets the sea
4
Chain or group of islands
9
Where river meets the sea
10
Flat elevated area of land
11
Cold treeless Arctic plain
纵向
2
Region surrounding the North Pole
5
Physical features of land
6
Mountain that can erupt with lava
7
Seasonal heavy rainfall
8
Large natural stream of water
12
Ridge of rock or coral near the surface
13
Low area between mountains