MMU Memory Management Unit, translates virtual to physical addresses and provides access permission control.
内存管理单位，把虚地址转化为物理地址并且提供访问许可控制。
The functions of the MMU are to control the various memory systems, translate the virtual addresses into physical addresses and control the access permission.
MMU的功能是控制各种存储系统的工作并将虚地址转换成物理地址，以及控制存储器访问权限。
The media access control (MAC) protocol of mobile Ad Hoc networks (MANETs) is closely-related with its physics layer, most MAC protocols request the capability of carrier sense in physical layer.
无线自组网的介质访问控制(MAC)协议是与物理层密切相关的，大多数MAC协议都要求物理层具备载波感知能力。
The system also allows more integration with third-party access control and physical security systems.
该系统还允许有第三方的访问控制和物理安全系统的更多的整合。
The open-architecture systems work seamlessly with about 30 technology partners, including video management, access control and physical security information management systems.
开放式的架构系统，且与大约30个技术合作伙伴有着密切的合作，包括视频管理，访问控制和实体安全信息管理系统。
The communication protocol is designed in term of three layers: Physical layer, Media Access Control layer and Logic Link Control layer.
本通信协议分为物理层、介质访问控制层和逻辑链路控制层三层设计。
The communication protocol is designed in term of three layers: Physical layer, Media Access Control layer and Logic Link Control layer.
本通信协议分为物理层、介质访问控制层和逻辑链路控制层三层设计。
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