横向
1
Cold treeless Arctic plain
5
Wearing away of land by water or wind
7
Imaginary line around the middle of Earth
11
City that is seat of government
12
Distance north or south of equator
15
Large body of water partly enclosed by land
纵向
2
Low-lying land surrounded by higher ground
3
Ridge of rock or coral near the surface
4
Goods sold to another country
6
Raised area of land, smaller than a mountain
8
Large area covered with trees
9
Land surrounded by water on three sides
10
Region between the two tropic lines
13
Vast body of salt water
14
Largest hot desert in the world