横向
1
Practice of establishing foreign colonies
2
Formal agreement between nations
6
Medieval land-for-service system
7
Person who travels to discover new lands
9
Armored warrior of medieval times
纵向
2
Exchange of goods between peoples
3
Legislative assembly of a country
4
Object made by humans from the past
5
Person with no fixed home
8
Military blockade of a fortified place
10
Freedom from outside control