横向
1
Low-lying land surrounded by higher ground
4
Vast body of salt water
6
Large slow-moving mass of ice
7
Ocean between Americas and Europe/Africa
纵向
2
Seasonal heavy rainfall
3
Deep narrow valley with steep sides
5
Landform where river meets the sea
8
Region between the two tropic lines
9
Flat grassland in tropical regions
10
Wearing away of land by water or wind