横向
1
Goods sold to another country
4
Land surrounded by water
8
Deep narrow valley with steep sides
9
Height above sea level
纵向
2
Line dividing two countries
3
Seasonal heavy rainfall
5
Low area between mountains
6
Steep rock face at edge of land
7
Area where water covers the soil
10
Region near the equator
11
Chain or group of islands
12
Land surrounded by water on three sides