横向
1
Largest ocean on Earth
5
Wearing away of land by water or wind
6
Landform where river meets the sea
7
Ocean between Americas and Europe/Africa
8
Flat grassland in tropical regions
11
Where river meets the sea
纵向
2
Ridge of rock or coral near the surface
3
Region near the equator
4
Tool for finding directions
9
Body of water surrounded by land
10
Goods brought in from another country
12
City that is seat of government
13
Height above sea level
14
Physical features of land
15
Raised area of land, smaller than a mountain