横向
1
Ridge of rock or coral near the surface
4
Deep narrow valley with steep sides
5
Large area covered with trees
6
Chain or group of islands
9
One of seven major landmasses
12
Landform where river meets the sea
纵向
2
Dry land with little rainfall
3
Land surrounded by water on three sides
7
Large body of water partly enclosed by land
8
Wearing away of land by water or wind
10
Large slow-moving mass of ice
11
Mountain that can erupt with lava
13
Visual representation of an area