Programs must sometimes enforce their own access control requirements on resources they are responsible for and on user accounts not recognized by the operating system.
对于所负责的资源和操作系统无法识别的用户帐户，程序有时必须强制实施它们自己的访问控制要求。
The hub repeater is responsible for managing connectivity on a per packet basis, while the hub controller provides status and control, and permits host access to the hub.
集线器中继器负责管理基于包的连接，而集线器控制器则提供状态信息和控制操作以支持主机访问。
Control layer: responsible for system access control, coordination relationship between the model and the view is the core of the system control unit.
控制层：主要负责系统的访问控制、协调模型和视图间的关系，是系统的核心控制单元。
Elv maintenance groups: responsible for the elv work, including fire alarm system, broadcasting system, emergency lighting system, monitoring systems, access control, conference room av system, etc.
弱电维修组：负责全厂弱电工作，包括火灾报警系统，广播系统，应急照明系统，监控系统，门禁系统，会议室影音系统等。
Elv maintenance groups: responsible for the elv work, including fire alarm system, broadcasting system, emergency lighting system, monitoring systems, access control, conference room av system, etc.
弱电维修组：负责全厂弱电工作，包括火灾报警系统，广播系统，应急照明系统，监控系统，门禁系统，会议室影音系统等。
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