横向
1
Tool for finding directions
4
Largest river in South America
5
Chain or group of islands
6
Vast body of salt water
7
City that is seat of government
9
Wearing away of land by water or wind
纵向
2
Large natural elevation of earth
3
Physical features of land
8
Goods sold to another country
10
Flat grassland in tropical regions
11
Large area covered with trees
12
Raised area of land, smaller than a mountain
13
Cold treeless Arctic plain
14
Deep narrow valley with steep sides