横向
1
Area where water covers the soil
4
Largest ocean on Earth
5
Half of the Earth
9
Large body of water partly enclosed by land
10
Physical features of land
纵向
2
Low area between mountains
3
Largest hot desert in the world
6
Wearing away of land by water or wind
7
Raised area of land, smaller than a mountain
8
Ocean between Americas and Europe/Africa