横向
1
Vast body of salt water
3
Region surrounding the North Pole
6
Largest ocean on Earth
7
Land surrounded by water on three sides
8
Goods sold to another country
13
Seasonal heavy rainfall
纵向
2
Landform where river meets the sea
4
Physical features of land
5
Low area between mountains
9
Largest river in South America
10
Wearing away of land by water or wind
11
Narrow sea inlet between cliffs
12
Large natural elevation of earth