横向
1
Practice of establishing foreign colonies
6
Formal agreement between nations
7
Practice of farming and growing food
8
Military blockade of a fortified place
9
Roman arena fighter
11
Legislative body in ancient Rome
12
Belonging to a very old period
纵向
2
Exchange of goods between peoples
3
Advanced stage of human society
4
Succession of rulers from same family
5
Fundamental law of a nation
10
Ancient Mesoamerican civilization