横向
1
Line dividing two countries
2
Goods sold to another country
4
Deep narrow valley with steep sides
6
Large area covered with trees
7
City that is seat of government
11
Land surrounded by water
12
Low area between mountains
纵向
2
Wearing away of land by water or wind
3
Vast body of salt water
5
Area where water covers the soil
7
One of seven major landmasses
8
Chain or group of islands
9
Distance north or south of equator
10
Ridge of rock or coral near the surface