横向
1
Goods brought in from another country
3
Deep narrow valley with steep sides
5
Largest river in South America
8
Steep rock face at edge of land
9
Vast body of salt water
10
Region between the two tropic lines
11
Area where water covers the soil
12
Low area between mountains
13
Body of water surrounded by land
纵向
2
Flat elevated area of land
4
Region near the equator
6
Low-lying land surrounded by higher ground
7
Chain or group of islands