When loading a control register, reserved bits should always be set to the values previously read. The flags in control registers are.

导入控制寄存器的值是，保留的位必须一直保留上一次读到的值。控制寄存器里的标识如下。

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As only 27 tokens are available for elements -- 5 bits, with the values 0 through 4 being reserved -- complex vocabularies need to be multiplexed by organizing token sets into separate code pages.

由于元素的标记只有27种——共占用5位，其中值从0到4为保留标记——复杂名词则需要进行复合，将标记集组织到不同的代码页中。

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SHF_MASKPROC All bits included in this mask are reserved for processor-specific semantics.

MASKPROC这个掩码中包括的所有的位是为特定处理器语意保留的。

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