横向
1
Medieval land-for-service system
4
Sudden overthrow of a government
5
Legislative body in ancient Rome
9
Union formed for mutual benefit
纵向
2
Ancient Mesoamerican civilization
3
Government by the people
6
Large territory under one ruler
7
Person with no fixed home
8
Long and distinct period of history
10
Person owned as property
11
Ancient empire that conquered much of Europe