横向
1
Landform where river meets the sea
4
Goods sold to another country
6
Flat grassland in tropical regions
9
Steep rock face at edge of land
10
One of seven major landmasses
12
Large slow-moving mass of ice
纵向
2
Ridge of rock or coral near the surface
3
Vast body of salt water
5
City that is seat of government
7
Physical features of land
8
Seasonal heavy rainfall
11
Region surrounding the North Pole