横向
1
Practice of establishing foreign colonies
6
Union formed for mutual benefit
8
Succession of rulers from same family
12
Ancient empire that conquered much of Europe
纵向
2
Belonging to a very old period
3
Payment made to show submission
4
Military blockade of a fortified place
5
Armed entry into another territory
7
Person who buys and sells goods
9
Armored warrior of medieval times
10
Advanced stage of human society
11
Person who travels to discover new lands