横向
1
Practice of establishing foreign colonies
6
Formal agreement between nations
7
Deadly epidemic disease
11
Armed conflict between nations
12
Sudden overthrow of a government
纵向
1
Period of one hundred years
2
Male monarch ruler
3
Legislative body in ancient Rome
4
Metal that replaced bronze in tools
5
Person who travels to discover new lands
8
Relating to the Middle Ages
9
Advanced stage of human society
10
Roman arena fighter