横向
1
Government by the people
5
Military blockade of a fortified place
7
Armed conflict between nations
8
Ancient empire that conquered much of Europe
9
Person who buys and sells goods
10
Alloy of copper and tin used in early tools
11
Person with no fixed home
12
Medieval land-for-service system
纵向
1
Period of ten years
2
Metal that replaced bronze in tools
3
Deadly epidemic disease
4
Exchange of goods between peoples
6
Object made by humans from the past
13
Movement of people to new areas
14
Person who travels to discover new lands