横向
1
Where river meets the sea
4
Cold treeless Arctic plain
5
Chain or group of islands
10
Largest hot desert in the world
纵向
2
Deep narrow valley with steep sides
3
Flat grassland in tropical regions
6
Large body of water partly enclosed by land
7
Large area covered with trees
8
Region near the equator
9
Flat elevated area of land
11
Narrow sea inlet between cliffs