横向
1
Freedom from outside control
8
Movement of people to new areas
9
Deadly epidemic disease
11
Ancient Mesoamerican civilization
13
Advanced stage of human society
14
Government ruled by a king or queen
纵向
2
Practice of establishing foreign colonies
3
Alloy of copper and tin used in early tools
4
Formal agreement between nations
5
Roman arena fighter
6
Long and distinct period of history
7
Metal that replaced bronze in tools
10
Medieval land-for-service system
11
Collection of traditional stories
12
Territory controlled by another country