横向
1
Line dividing two countries
4
Chain or group of islands
6
Largest ocean on Earth
7
Vast body of salt water
10
Goods brought in from another country
11
Region between the two tropic lines
12
Visual representation of an area
纵向
2
Deep narrow valley with steep sides
3
Flat elevated area of land
5
Large natural stream of water
8
Flat grassland in tropical regions
9
Largest river in South America