横向
1
Legislative body in ancient Rome
5
Roman arena fighter
7
Person who travels to discover new lands
8
Long and distinct period of history
10
Union formed for mutual benefit
12
Object made by humans from the past
纵向
2
Movement of people to new areas
3
Formal agreement between nations
4
Succession of rulers from same family
6
Deadly epidemic disease
9
Practice of establishing foreign colonies
11
Alloy of copper and tin used in early tools