横向
1
Large slow-moving mass of ice
3
Deep narrow valley with steep sides
5
One of seven major landmasses
7
Raised area of land, smaller than a mountain
11
Cold treeless Arctic plain
12
Ridge of rock or coral near the surface
纵向
2
Where river meets the sea
4
Large natural stream of water
6
Distance north or south of equator
8
Region surrounding the North Pole
9
Imaginary line around the middle of Earth
10
Goods brought in from another country
13
Largest river in South America