横向
1
Wearing away of land by water or wind
4
Distance north or south of equator
5
Goods brought in from another country
6
Vast body of salt water
8
Ridge of rock or coral near the surface
13
Low area between mountains
纵向
2
Region surrounding the North Pole
3
Large slow-moving mass of ice
7
Large natural elevation of earth
9
Landform where river meets the sea
10
Largest hot desert in the world
11
Steep rock face at edge of land
12
Physical features of land