横向
1
Movement of people to new areas
4
Person owned as property
7
Belonging to a very old period
8
Formal agreement between nations
9
Sudden overthrow of a government
纵向
2
Person with no fixed home
3
Armed entry into another territory
4
Legislative body in ancient Rome
5
Deadly epidemic disease
6
Legislative assembly of a country
10
Exchange of goods between peoples
11
Succession of rulers from same family
12
Ancient empire that conquered much of Europe