横向
1
Armed conflict between nations
3
Long and distinct period of history
4
Formal agreement between nations
7
Alloy of copper and tin used in early tools
8
Exchange of goods between peoples
9
Government ruled by a king or queen
纵向
2
Military conflict or fight
5
Armored warrior of medieval times
6
Ancient empire that conquered much of Europe
10
Person who travels to discover new lands