横向
1
Goods brought in from another country
5
Long-term weather patterns of an area
6
Largest ocean on Earth
7
Flat grassland in tropical regions
8
Low area between mountains
9
Largest river in South America
10
Physical features of land
纵向
2
Largest hot desert in the world
3
Flat elevated area of land
4
Wearing away of land by water or wind