横向
1
Dry land with little rainfall
5
Total number of people in an area
6
Largest ocean on Earth
7
Long-term weather patterns of an area
8
Low-lying land surrounded by higher ground
9
Flat grassland in tropical regions
纵向
2
Ridge of rock or coral near the surface
3
Distance east or west of prime meridian
4
Where river meets the sea
10
Goods brought in from another country
11
Imaginary line around the middle of Earth
12
Land surrounded by water on three sides
13
Tool for finding directions