横向
1
Line dividing two countries
4
Vast body of salt water
5
Raised area of land, smaller than a mountain
6
Piece of land jutting into the sea
9
Largest river in South America
纵向
2
Total number of people in an area
3
Ridge of rock or coral near the surface
6
Steep rock face at edge of land
7
Visual representation of an area
8
Imaginary line around the middle of Earth