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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This paper provides all procedures of the controlling layer of sampling module, stirring module, washing module, CAN and TWI communications and are proved right after testing.

详细叙述了加样模块、搅拌模块和清洗模块三个模块控制层的程序流程以及CAN和TWI通讯的程序，经过调试证明所有程序运行正常。

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Describing the concept, purpose, function, elements and procedures of the system analysis this paper focuses on the evaluation method and layer analysis technique of the modern system in detail.

在简述系统分析的概念、目的、作用、要素和步骤之基础上，详细论述现代系统评价方法和层次分析技术。

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