横向
1
One of seven major landmasses
4
Largest hot desert in the world
5
Flat elevated area of land
6
Ocean between Americas and Europe/Africa
7
Long-term weather patterns of an area
9
Low-lying land surrounded by higher ground
纵向
2
Half of the Earth
3
Wearing away of land by water or wind
8
Line dividing two countries
10
Deep narrow valley with steep sides