横向
1
Person with no fixed home
4
Long and distinct period of history
5
Union formed for mutual benefit
7
Payment made to show submission
8
Succession of rulers from same family
10
Sudden overthrow of a government
纵向
2
Alloy of copper and tin used in early tools
3
Practice of establishing foreign colonies
5
Practice of farming and growing food
6
Period of ten years
9
Person who buys and sells goods