横向
1
Region between the two tropic lines
3
Largest ocean on Earth
5
Goods brought in from another country
6
Cold treeless Arctic plain
7
Distance east or west of prime meridian
11
Deep narrow valley with steep sides
纵向
2
Largest river in South America
3
Total number of people in an area
4
Mountain that can erupt with lava
8
Goods sold to another country
9
Line dividing two countries
10
Flat elevated area of land
12
Height above sea level