横向
1
Exchange of goods between peoples
5
Legislative body in ancient Rome
6
Deadly epidemic disease
7
Medieval land-for-service system
10
Union formed for mutual benefit
纵向
2
Sudden overthrow of a government
3
Armed entry into another territory
4
Government elected by the people
8
Ancient Mesoamerican civilization
9
Collection of traditional stories
11
Payment made to show submission
12
Object made by humans from the past