横向
1
Largest ocean on Earth
3
Dry land with little rainfall
4
Line dividing two countries
6
Low-lying land surrounded by higher ground
7
Largest river in South America
8
Height above sea level
9
Distance east or west of prime meridian
12
Body of water surrounded by land
纵向
2
Area where water covers the soil
5
Seasonal heavy rainfall
8
Chain or group of islands
10
Goods sold to another country
11
Tool for finding directions