横向
1
Period of one hundred years
4
Person with no fixed home
7
Metal that replaced bronze in tools
8
Military blockade of a fortified place
9
Exchange of goods between peoples
10
Large territory under one ruler
纵向
2
Movement of people to new areas
3
Medieval land-for-service system
5
Period of ten years
6
Ancient Egyptian picture writing
9
Formal agreement between nations
11
Alloy of copper and tin used in early tools
12
Medieval religious military campaign