横向
1
Movement of people to new areas
5
Exchange of goods between peoples
6
Advanced stage of human society
7
Government by the people
8
Object made by humans from the past
纵向
2
Armed entry into another territory
3
Handwritten historical document
4
Fundamental law of a nation
9
Long and distinct period of history
10
Metal that replaced bronze in tools
11
Practice of establishing foreign colonies