横向
1
Cold treeless Arctic plain
5
Large area covered with trees
6
Body of water surrounded by land
7
Flat elevated area of land
8
Wearing away of land by water or wind
9
Goods brought in from another country
纵向
2
One of seven major landmasses
3
Large natural elevation of earth
4
Landform where river meets the sea
10
Land surrounded by water on three sides
11
Ridge of rock or coral near the surface