横向
1
Formal agreement between nations
3
Relating to the Middle Ages
4
Person with no fixed home
6
Succession of rulers from same family
8
Military blockade of a fortified place
9
Ancient Mesoamerican civilization
10
Fortified medieval residence
11
Territory controlled by another country
纵向
1
Payment made to show submission
2
Union formed for mutual benefit
5
Metal that replaced bronze in tools
6
Government by the people
7
Period of ten years