横向
1
Period of one hundred years
4
Military blockade of a fortified place
6
Exchange of goods between peoples
8
Payment made to show submission
9
Union formed for mutual benefit
11
Metal that replaced bronze in tools
纵向
2
Armed conflict between nations
3
Large territory under one ruler
5
Government elected by the people
6
Formal agreement between nations
7
Legislative assembly of a country
10
Ancient Mesoamerican civilization
12
Medieval land-for-service system
13
Person who buys and sells goods
14
Belonging to a very old period