横向
1
Ridge of rock or coral near the surface
3
Dry land with little rainfall
7
Largest river in South America
10
Largest ocean on Earth
11
Flat grassland in tropical regions
13
Vast body of salt water
纵向
2
Area where water covers the soil
4
Large body of water partly enclosed by land
5
Large natural stream of water
6
Goods brought in from another country
8
Low-lying land surrounded by higher ground
9
City that is seat of government
12
Visual representation of an area