横向
1
Large natural elevation of earth
4
Dry land with little rainfall
6
Landform where river meets the sea
7
Largest river in South America
8
Body of water surrounded by land
12
Region between the two tropic lines
纵向
2
Flat grassland in tropical regions
3
Distance north or south of equator
5
Goods brought in from another country
9
Chain or group of islands
10
Deep narrow valley with steep sides
11
Mountain that can erupt with lava