横向
1
Person owned as property
4
Government elected by the people
5
Government by the people
7
Sudden overthrow of a government
8
Payment made to show submission
10
Ancient empire that conquered much of Europe
12
Person with no fixed home
13
Person who travels to discover new lands
14
Person who buys and sells goods
纵向
2
Exchange of goods between peoples
3
Practice of farming and growing food
6
Ancient Mesoamerican civilization
9
Roman arena fighter
11
Ancient Egyptian stone monument
15
Ancient Egyptian ruler