横向
1
Total number of people in an area
5
Body of water surrounded by land
7
Largest river in South America
8
Goods sold to another country
9
Area where water covers the soil
13
Physical features of land
纵向
2
Region near the equator
3
Flat grassland in tropical regions
4
Deep narrow valley with steep sides
6
City that is seat of government
10
Vast body of salt water
11
Distance east or west of prime meridian
12
Large natural stream of water
14
Long-term weather patterns of an area