横向
1
Deep narrow valley with steep sides
4
Raised area of land, smaller than a mountain
5
Goods brought in from another country
6
Large area covered with trees
7
Distance north or south of equator
11
Ocean between Americas and Europe/Africa
12
Flat grassland in tropical regions
纵向
2
Low area between mountains
3
Where river meets the sea
8
Goods sold to another country
9
Area where water covers the soil
10
Wearing away of land by water or wind