横向
1
One of seven major landmasses
6
Region surrounding the North Pole
7
Ocean between Americas and Europe/Africa
9
Cold treeless Arctic plain
纵向
2
Largest ocean on Earth
3
Large natural elevation of earth
4
Wearing away of land by water or wind
5
Low-lying land surrounded by higher ground
8
Region between the two tropic lines
10
Flat elevated area of land
11
Chain or group of islands
12
Goods brought in from another country
13
Long-term weather patterns of an area