横向
1
Large natural elevation of earth
4
Physical features of land
5
Region surrounding the North Pole
10
Largest ocean on Earth
12
Flat grassland in tropical regions
13
Goods sold to another country
纵向
2
Large natural stream of water
3
Area where water covers the soil
6
Body of water surrounded by land
7
Region near the equator
7
Region between the two tropic lines
8
Landform where river meets the sea
9
Ocean between Americas and Europe/Africa
11
Large area covered with trees