横向
1
Low-lying land surrounded by higher ground
4
Goods sold to another country
6
Region surrounding the North Pole
7
Distance east or west of prime meridian
9
Land surrounded by water on three sides
10
Line dividing two countries
纵向
2
Flat elevated area of land
3
Region between the two tropic lines
5
Low area between mountains
8
Mountain that can erupt with lava