This paper introduces the attack tree model, presents a network attack system based on attack tree, which can make attack scenario base on the target's practice and do it.

文章介绍了攻击树模型，提出了一种基于攻击树的网络攻击系统，它可以根据目标的实际情况制定出攻击策略，实施攻击。

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Throughout analysis, the attack tree model is a good choice to describe the information system security, finally, discusses the characteristics of this model.

通过分析发现，利用攻击树模型对信息系统安全进行度量，是比较好的选择。最后对本模型的特点进行了讨论。

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This cast of the bronchial tree is formed of inspissated mucus and was coughed up by a patient during an asthmatic attack.

通过粘液和模仿咳嗽建立哮喘发作时病人的支气管树模型。

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The attack, which came as the teenagers huddled under a tree in the rain, was intended in retaliation for a July attack against Mr Williams, who declined to prosecute a suspect in that shooting, Mr McCarthy said.

BBC: Kenneth Williams (left) and Michael Ward booking photos

In the predawn hours before the attack, he called his police handler, met him near the Temple Under a Big Tree, and told him about the murder plot and about Siu.

NEWYORKER: The God of Gamblers