横向
1
Practice of establishing foreign colonies
4
Exchange of goods between peoples
7
Fundamental law of a nation
8
Armored warrior of medieval times
纵向
1
Territory controlled by another country
2
Ancient Mesoamerican civilization
3
Deadly epidemic disease
4
Payment made to show submission
5
Succession of rulers from same family
6
Sudden overthrow of a government
9
Advanced stage of human society