横向
1
Low area between mountains
4
Area where water covers the soil
5
Region between the two tropic lines
6
One of seven major landmasses
8
Largest ocean on Earth
11
Chain or group of islands
12
Mountain that can erupt with lava
纵向
2
Goods sold to another country
3
Distance north or south of equator
7
Largest river in South America
9
Where river meets the sea
10
Ocean between Americas and Europe/Africa