横向
1
Ocean between Americas and Europe/Africa
5
Goods sold to another country
7
Largest ocean on Earth
8
Region between the two tropic lines
9
Long-term weather patterns of an area
10
Wearing away of land by water or wind
11
Narrow sea inlet between cliffs
12
Total number of people in an area
纵向
2
Low area between mountains
3
Distance east or west of prime meridian
4
Half of the Earth
6
Largest river in South America
13
Steep rock face at edge of land