横向
1
Flat elevated area of land
5
Large natural elevation of earth
6
Ocean between Americas and Europe/Africa
9
Tool for finding directions
12
Ridge of rock or coral near the surface
纵向
2
Goods brought in from another country
3
Largest ocean on Earth
4
Region surrounding the North Pole
7
Largest river in South America
8
Low area between mountains
10
Flat grassland in tropical regions
11
Cold treeless Arctic plain
13
Chain or group of islands