实时时钟电路（X1228）被用作里程表，数据存储器和车速表中的警报。

A real-time clock circuit(X1228)is applied to be an hourmeter, data memorizer and alarm in speedometer.

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一旦将表分布到多个表空间中，就必须决定它们的物理存储器。

Once tables are distributed among table spaces, you need to determine their physical storage.

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处理器通过观察存储页表(由存储器核心维持)来决定存储区域的类型。

The processor determines the type of a given memory region mainly by looking at page tables, which are maintained by the kernel.

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