横向
1
Advanced stage of human society
5
Medieval land-for-service system
6
Person who buys and sells goods
7
Alloy of copper and tin used in early tools
9
Military conflict or fight
纵向
2
Exchange of goods between peoples
3
Large territory under one ruler
4
Union formed for mutual benefit
8
Movement of people to new areas
10
Ancient Egyptian stone monument
11
Payment made to show submission