横向
1
Union formed for mutual benefit
4
Ancient Egyptian stone monument
6
Alloy of copper and tin used in early tools
7
Legislative body in ancient Rome
10
Metal that replaced bronze in tools
纵向
2
Person who travels to discover new lands
3
Medieval land-for-service system
5
Government elected by the people
8
Succession of rulers from same family
9
Long and distinct period of history