横向
1
Exchange of goods between peoples
4
Freedom from outside control
5
Roman arena fighter
纵向
2
Person owned as property
3
Alloy of copper and tin used in early tools
4
Armed entry into another territory
6
Sudden overthrow of a government
7
Advanced stage of human society
8
Medieval religious military campaign
9
Succession of rulers from same family
10
Government elected by the people