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A sad but inescapable fact of human history
戰爭推動技術的發展是人類歷史上
is that war drives technology.
一個可悲但無法回避的事實
A new kind of weapon will transform the way we fight,
新型的武器將改變戰爭的模式
Help unify an empire,
有助于國家統一
and lay the foundations for a feat of engineering
也為工業的發展創造了基礎
That will change the face of the planet.
這一切將改變整個世界
China, 200 years before christ.
公元前兩百年的中國
The soldiers of China's first emperor
秦始皇的士兵們
change the face of warfare with a new kind of weapon:
用一種新型武器改變了戰爭形態
The crossbow.
它就是弩
The Chinese crossbow draws back nearly 24 inches,
中國的弩 其弦能向后拉二十四英寸
more than five times that of a European crossbow,
是歐洲十字弓的五倍
so, for the same weight of bow, you get five times the power,
在弓的重量一樣時 就會多出五倍的發力
five times the range and five times the punch.
五倍的射程和穿透力
Bolts with an iron core,
弩箭為鐵芯
fired at high velocity, nearly a quarter mile.
若以很快的速度射出 射程可達四分之一英里
In the history of mankind,
在人類歷史上
this was really the first time that mass productions
這是大規模生產第一次
became so important as part of state building,
對一個國家的建立
empire building.
起著如此重要的作用
Easy to use, with just a few days' training,
弩使用簡便 只需幾天時間的訓練
Foot soldiers become killing machines.
步兵就能成為殺人機器
