横向
1
Person who buys and sells goods
5
Ancient empire that conquered much of Europe
7
Belonging to a very old period
8
Ancient Mesoamerican civilization
纵向
2
Person with no fixed home
3
Exchange of goods between peoples
4
Period of one hundred years
6
Person who travels to discover new lands
9
Succession of rulers from same family
10
Object made by humans from the past