横向
1
Belonging to a very old period
5
Union formed for mutual benefit
6
Practice of establishing foreign colonies
7
Long and distinct period of history
8
Alloy of copper and tin used in early tools
9
Period of ten years
11
Uprising against authority
纵向
2
Exchange of goods between peoples
3
Sudden overthrow of a government
4
Payment made to show submission
10
Armed entry into another territory
12
Practice of farming and growing food