横向
1
Seasonal heavy rainfall
3
Largest ocean on Earth
4
Flat elevated area of land
7
Largest hot desert in the world
8
Region surrounding the North Pole
10
Raised area of land, smaller than a mountain
12
Body of water surrounded by land
13
Low-lying land surrounded by higher ground
纵向
2
Flat grassland in tropical regions
3
Land surrounded by water on three sides
5
Largest river in South America
6
Large natural elevation of earth
9
Dry land with little rainfall
11
Goods sold to another country