横向
1
Practice of establishing foreign colonies
7
Period of one hundred years
8
Deadly epidemic disease
9
Person who buys and sells goods
10
Armed conflict between nations
11
Union formed for mutual benefit
12
Metal that replaced bronze in tools
纵向
2
Government by the people
3
Government elected by the people
4
Freedom from outside control
5
Person who travels to discover new lands
6
Fundamental law of a nation