横向
1
Long and distinct period of history
4
Alloy of copper and tin used in early tools
5
Metal that replaced bronze in tools
6
Collection of traditional stories
8
Uprising against authority
11
Ancient Mesoamerican civilization
13
Payment made to show submission
14
Person owned as property
纵向
2
Advanced stage of human society
3
Period of one hundred years
7
Medieval land-for-service system
9
Person with no fixed home
10
Person who buys and sells goods
12
Sudden overthrow of a government