横向
1
Low area between mountains
4
Goods sold to another country
5
Mountain that can erupt with lava
7
Seasonal heavy rainfall
8
Largest ocean on Earth
9
Largest river in South America
13
Land surrounded by water on three sides
14
Distance north or south of equator
纵向
2
Wearing away of land by water or wind
3
Large slow-moving mass of ice
6
Largest hot desert in the world
10
Region near the equator
11
Ridge of rock or coral near the surface
12
City that is seat of government