横向
1
Physical features of land
5
Half of the Earth
9
Landform where river meets the sea
11
Flat grassland in tropical regions
12
Chain or group of islands
纵向
2
Low-lying land surrounded by higher ground
3
Flat elevated area of land
4
Region surrounding the North Pole
6
Line dividing two countries
7
Largest ocean on Earth
8
Seasonal heavy rainfall
10
Wearing away of land by water or wind