横向
1
Area where water covers the soil
4
Line dividing two countries
6
Narrow sea inlet between cliffs
7
Imaginary line around the middle of Earth
8
Largest ocean on Earth
9
Cold treeless Arctic plain
纵向
2
Wearing away of land by water or wind
3
Seasonal heavy rainfall
5
Height above sea level
10
One of seven major landmasses
11
Ocean between Americas and Europe/Africa