横向
1
Dry land with little rainfall
4
Large slow-moving mass of ice
5
Imaginary line around the middle of Earth
6
Total number of people in an area
7
Landform where river meets the sea
8
One of seven major landmasses
12
Land surrounded by water
纵向
2
Chain or group of islands
3
Region between the two tropic lines
9
Line dividing two countries
10
Large natural elevation of earth
11
Ridge of rock or coral near the surface