横向
1
Belonging to a very old period
6
Sudden overthrow of a government
7
Medieval land-for-service system
8
Exchange of goods between peoples
9
Long and distinct period of history
纵向
2
Ancient Egyptian stone monument
3
Person owned as property
4
Period of one hundred years
5
Fortified medieval residence
10
Advanced stage of human society
11
Succession of rulers from same family
12
Deadly epidemic disease