横向
1
Wearing away of land by water or wind
5
Dry land with little rainfall
6
Ridge of rock or coral near the surface
11
Region between the two tropic lines
12
Where river meets the sea
纵向
2
Landform where river meets the sea
3
Seasonal heavy rainfall
4
Goods brought in from another country
7
Steep rock face at edge of land
8
Distance north or south of equator
9
Largest river in South America
10
Chain or group of islands