横向
1
Large territory under one ruler
4
Armed entry into another territory
5
Ancient Mesoamerican civilization
7
Medieval land-for-service system
8
Legislative assembly of a country
9
Belonging to a very old period
10
Exchange of goods between peoples
11
Sudden overthrow of a government
纵向
2
Roman arena fighter
3
Freedom from outside control
4
Metal that replaced bronze in tools
6
Long and distinct period of history
12
Ancient Egyptian stone monument