横向
1
Low area between mountains
3
Flat elevated area of land
4
Land surrounded by water
7
Large natural stream of water
8
Region between the two tropic lines
9
Large body of water partly enclosed by land
11
Deep narrow valley with steep sides
12
Chain or group of islands
纵向
2
Largest ocean on Earth
3
Total number of people in an area
5
Distance north or south of equator
6
Flat grassland in tropical regions
10
Vast body of salt water