横向
1
Person owned as property
4
Exchange of goods between peoples
5
Ancient Mesoamerican civilization
6
Period of ten years
7
Practice of farming and growing food
纵向
2
Period of one hundred years
3
Person who travels to discover new lands
8
Government ruled by a king or queen
9
Person who buys and sells goods
10
Union formed for mutual benefit
11
Practice of establishing foreign colonies