值得一提的是，2012款宝马5系Li还配有主动安全保护系统（Active protection），该系统增加了全车的预紧式安全带，当紧急情况发生时会提前收紧安全带把乘客的身体约束在座椅里，同时自动升起车窗玻璃和电动天...
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被动安全系统在事故是保护乘客，如一个胶皮安全气囊和安全带。主动安全系统帮助预防事故，如abs和TCS。
Passive safety system protects the passengers in case of an accident such as airbag and seat-belt tightener. Active safety systems help prevent accidents such as ABS and TCS.
入侵检测系统是一种主动保护网络资源的网络安全系统，近年来得到了广泛的研究与应用。
The invasion detection system is one kind of initiative protection network resources network security system, in recent years, we obtained extensive research and the application.
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