横向
1
Landform where river meets the sea
4
Imaginary line around the middle of Earth
5
Deep narrow valley with steep sides
7
Line dividing two countries
9
Low area between mountains
10
Largest ocean on Earth
11
One of seven major landmasses
12
Goods brought in from another country
13
Flat elevated area of land
纵向
2
Large natural stream of water
3
Where river meets the sea
6
Region surrounding the North Pole
7
Low-lying land surrounded by higher ground
8
Distance north or south of equator