横向
1
Line dividing two countries
5
Flat elevated area of land
7
Wearing away of land by water or wind
8
Chain or group of islands
纵向
2
Deep narrow valley with steep sides
3
Cold treeless Arctic plain
4
Large slow-moving mass of ice
6
Large body of water partly enclosed by land
9
Goods brought in from another country
10
One of seven major landmasses
11
Land surrounded by water
12
Region near the equator