横向
1
Wearing away of land by water or wind
3
Body of water surrounded by land
8
Cold treeless Arctic plain
9
Region surrounding the North Pole
纵向
2
Dry land with little rainfall
4
Narrow sea inlet between cliffs
5
Large body of water partly enclosed by land
6
Region near the equator
7
Ocean between Americas and Europe/Africa
10
Largest ocean on Earth