Upgrading should be done only by users who have expert knowledge of computer hardware and hardware configuration Settings.

升级只应由拥有计算机硬件和硬件配置设置的专业知识的用户执行。

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Because the traditional blackboard model is based on serial hardware environment, its efficiency and reliability is limited and lots of expert systems based on the model can't be put into use.

由于传统的黑板模型是基于串行硬件环境之上的，因此其效率和可靠性受到极大限制，使以此模型为结构的很多专家系统无法实用化。

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