横向
1
Low-lying land surrounded by higher ground
4
Area where water covers the soil
5
Tool for finding directions
8
Ocean between Americas and Europe/Africa
10
Vast body of salt water
纵向
2
Land surrounded by water
3
Large slow-moving mass of ice
6
Total number of people in an area
7
Goods sold to another country
9
Largest hot desert in the world
11
Largest ocean on Earth