横向
1
Exchange of goods between peoples
5
Person owned as property
7
Belonging to a very old period
9
Movement of people to new areas
纵向
2
Roman arena fighter
3
Government ruled by a king or queen
4
Period of ten years
6
Alloy of copper and tin used in early tools
8
Deadly epidemic disease
10
Advanced stage of human society
11
Handwritten historical document