横向
1
Height above sea level
2
Large area covered with trees
6
Ridge of rock or coral near the surface
7
Ocean between Americas and Europe/Africa
8
One of seven major landmasses
11
Vast body of salt water
纵向
2
Narrow sea inlet between cliffs
3
Distance north or south of equator
4
Goods sold to another country
5
Region near the equator
7
Largest river in South America
9
Wearing away of land by water or wind
10
Total number of people in an area
12
Flat grassland in tropical regions
13
Cold treeless Arctic plain