横向
1
Exchange of goods between peoples
3
Ancient Egyptian ruler
4
Military blockade of a fortified place
5
Medieval land-for-service system
6
Alloy of copper and tin used in early tools
7
Armored warrior of medieval times
纵向
1
Formal agreement between nations
2
Practice of establishing foreign colonies
3
Deadly epidemic disease
8
Person who travels to discover new lands
9
Large territory under one ruler