横向
1
Goods sold to another country
2
Total number of people in an area
4
Ridge of rock or coral near the surface
5
Flat grassland in tropical regions
7
Raised area of land, smaller than a mountain
8
Cold treeless Arctic plain
纵向
2
Flat elevated area of land
3
One of seven major landmasses
6
Mountain that can erupt with lava
9
Body of water surrounded by land
10
Physical features of land
11
Distance north or south of equator
12
Land surrounded by water
13
Dry land with little rainfall