Tuesday, 24 August 2010

攻与防

虽然门是用来通行的,而墙是阻止通行的,精心设防的门要比不设防的墙坚固得多。从战争的角度看,只有傻瓜才会往对手设下的圈套里钻。别忘了,系统通常是在最薄弱点(内部的或外部的)被攻破的。

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