横向
1
Large area covered with trees
4
Low-lying land surrounded by higher ground
5
Large slow-moving mass of ice
8
Goods brought in from another country
9
Vast body of salt water
10
One of seven major landmasses
12
Largest river in South America
13
Distance east or west of prime meridian
纵向
2
Largest hot desert in the world
3
Area where water covers the soil
6
Seasonal heavy rainfall
7
Low area between mountains
11
Dry land with little rainfall