横向
1
Landform where river meets the sea
4
Seasonal heavy rainfall
5
City that is seat of government
10
Flat grassland in tropical regions
12
Wearing away of land by water or wind
13
Goods sold to another country
纵向
2
Imaginary line around the middle of Earth
3
Distance east or west of prime meridian
6
Height above sea level
7
Mountain that can erupt with lava
8
Steep rock face at edge of land
9
Large natural elevation of earth
11
Region surrounding the North Pole