横向
1
Metal that replaced bronze in tools
4
Alloy of copper and tin used in early tools
5
Person who travels to discover new lands
7
Exchange of goods between peoples
9
Freedom from outside control
10
Government by the people
11
Object made by humans from the past
纵向
2
Large territory under one ruler
3
Collection of traditional stories
6
Practice of establishing foreign colonies
8
Military conflict or fight