横向
1
Land surrounded by water on three sides
7
Large natural elevation of earth
8
Imaginary line around the middle of Earth
9
Wearing away of land by water or wind
10
Dry land with little rainfall
11
Landform where river meets the sea
12
Vast body of salt water
纵向
1
Largest ocean on Earth
2
Largest hot desert in the world
3
Low area between mountains
4
Total number of people in an area
5
Goods brought in from another country
6
Seasonal heavy rainfall
13
Goods sold to another country