As we noted earlier, this abstraction layer also complicates the use of advanced security controls, such as hardware security modules, possibly leading to poor key management procedures.

我们前面也提到了，这个抽象层还让先进的安全控制——像是硬件安全模块——的使用更加复杂，结果就可能是蹩脚的密钥管理程序。

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And it expounds many aspects, such as the system design route, the software or hardware, function modules, the system function and its management.

着重从系统的设计思路、系统软硬件、系统功能模块，及系统运行和管理等方面进行了深入阐述。

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Hardware circuit design includes a central processing unit circuit, clock circuit, assembly language software to achieve, including the main program, subroutine, such as set-up time software modules.

硬件电路设计主要包括中央处理单元电路、时钟电路、软件用汇编语言来实现，主要包括主程序、时光设置子程序等软件模块。

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