横向
1
Formal agreement between nations
2
Movement of people to new areas
4
Object made by humans from the past
5
Practice of farming and growing food
6
Military blockade of a fortified place
8
Person who travels to discover new lands
9
Long and distinct period of history
纵向
2
Person who buys and sells goods
3
Roman arena fighter
7
Period of ten years
10
Belonging to a very old period
11
Practice of establishing foreign colonies
12
Large territory under one ruler