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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Chapter 21 Strange Sounds. — A Night Attack. — Kennedy and Joe in the Tree. — Two Shots. —"Help! help! "— Reply in French. — The Morning. — The Missionary. — The Plan of Rescue 167

第二十一章奇怪的嘈杂声/晚间袭击/肯尼迪和乔在树上/两声枪响/“救命！救命！”/用法语回答/早晨/传教士/营救计划/。

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Chapter 21 Strange Sounds. — A Night Attack. — Kennedy and Joe in the Tree. — Two Shots. —"Help! help! "— Reply in French. — The Morning. — The Missionary. — The Plan of Rescue 167

第二十一章奇怪的嘈杂声/晚间袭击/肯尼迪和乔在树上/两声枪响/“救命！救命！”/用法语回答/早晨/传教士/营救计划/。

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