横向
1
Payment made to show submission
4
Period of ten years
8
Ancient empire that conquered much of Europe
10
Practice of establishing foreign colonies
11
Collection of traditional stories
12
Metal that replaced bronze in tools
13
Ancient Mesoamerican civilization
14
Practice of farming and growing food
纵向
2
Movement of people to new areas
3
Person who buys and sells goods
5
Ancient Egyptian picture writing
6
Government ruled by a king or queen
7
Medieval land-for-service system
9
Large territory under one ruler
15
Person with no fixed home