横向
1
Chain or group of islands
6
Ridge of rock or coral near the surface
9
Region surrounding the North Pole
10
Where river meets the sea
11
Raised area of land, smaller than a mountain
12
Steep rock face at edge of land
纵向
2
Seasonal heavy rainfall
3
Large area covered with trees
4
Region near the equator
5
Land surrounded by water on three sides
7
Half of the Earth
8
Deep narrow valley with steep sides
13
Flat elevated area of land