横向
1
Total number of people in an area
6
Ridge of rock or coral near the surface
7
Flat elevated area of land
9
Long-term weather patterns of an area
10
Landform where river meets the sea
纵向
2
Goods sold to another country
3
Largest hot desert in the world
4
Imaginary line around the middle of Earth
5
Region surrounding the North Pole
8
Flat grassland in tropical regions
9
Deep narrow valley with steep sides
11
Seasonal heavy rainfall
12
Body of water surrounded by land