Background: Deep in the bowels of Cheyenne Mountain is a city-like military complex that once served as North American Aerospace Defense Command (NORAD) 's center.
背景材料：在夏延山的深处像一座城市一样的军事综合隧道，一度作为北美防空司令部(NORAD)的中心。
The defense wall and the deep and wide ditch surround the whole complex, not as part of a military fortification rather as a form of restricted ceremonial isolation.
防护墙和既深又宽的水渠环绕着整个建筑群，它们并不是军事防护工事的一部分，而只是一种仪式上的限制隔离。
Experiment results indicated that the scheme has better flexibility and responds well to the request to implement complex defense strategies.
实验表明，该方案有较好的灵活性与可扩展性，能适应部署复杂防御策略的需求。
Indirect purchaser status and passing-on defense is more complex issue of the standing.
间接购买者的地位和转移抗辩是原告资格确定中比较复杂的问题。
Innate immune system is the first line of defense of the body against foreign pathogens, which gives birth to a very complex acquired immune response.
天然免疫系统是机体抵御外来病原体的第一道防线，在此基础上衍生出十分复杂的获得性免疫反应。
Vulnerability is the inherent nature of the complex network and the focus of network attack and defense.
脆弱性是复杂网络系统的固有本性，是网络攻防的焦点。
Vulnerability is the inherent nature of the complex network and the focus of network attack and defense.
脆弱性是复杂网络系统的固有本性，是网络攻防的焦点。
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