横向
1
Government ruled by a king or queen
3
Person owned as property
5
Medieval land-for-service system
9
Alloy of copper and tin used in early tools
11
Metal that replaced bronze in tools
12
Fundamental law of a nation
13
Male monarch ruler
纵向
2
Long and distinct period of history
4
Roman arena fighter
6
Person who travels to discover new lands
7
Union formed for mutual benefit
8
Collection of traditional stories
10
Exchange of goods between peoples