This thesis also deeply studied knowledge expression method, the mode of establishing knowledge base, the realization method of inference mechanism under O-O environment.
深入研究了在面向对象的环境下，专家系统中知识表达的实用形式、知识库的建立模式以及推理机制的具体实现方法；
The type blockio sets the disk to direct block I/O mode without page cache.
类型 blockio 把这个磁盘设置为直接块 I/O 模式，没有页面缓存。
To be more selective, you may prefix the mode expression with u to set the permission for users, g to set it for groups, and o to set it for others.
为了更具可选性，您可以给模式描述加前缀 u 来设置用户权限，g 来设置组权限，还有 o 为其他人设置。
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