横向
1
Area where water covers the soil
4
Goods sold to another country
9
Total number of people in an area
10
Mountain that can erupt with lava
11
Vast body of salt water
13
Large natural stream of water
纵向
2
Chain or group of islands
3
Low area between mountains
5
Region between the two tropic lines
6
Wearing away of land by water or wind
7
Landform where river meets the sea
8
Large area covered with trees
12
Seasonal heavy rainfall