横向
1
Metal that replaced bronze in tools
3
Advanced stage of human society
4
Ancient Mesoamerican civilization
7
Payment made to show submission
12
Person who travels to discover new lands
13
Succession of rulers from same family
纵向
2
Government by the people
5
Belonging to a very old period
6
Long and distinct period of history
8
Movement of people to new areas
9
Ancient Egyptian picture writing
10
Ancient Egyptian stone monument
11
Object made by humans from the past
14
Armed entry into another territory