横向
1
One of seven major landmasses
5
Low area between mountains
6
Low-lying land surrounded by higher ground
9
Distance north or south of equator
11
Body of water surrounded by land
纵向
1
Deep narrow valley with steep sides
2
Area where water covers the soil
3
Height above sea level
4
Largest river in South America
7
Large natural stream of water
8
Wearing away of land by water or wind
10
Long-term weather patterns of an area