表 2 描述了主要的寻址形式。 表 3 给出了命令。

The major forms of addressing are described in Table 2. Commands are given in Table 3.

youdao

寻址的页不在内存中，对应的页表条目是空的，或者是违背了页式管理的保护机制。

The addressed page is not present in memory, the corresponding page Table entry is null, or a violation of the paging protection mechanism has occurred.

youdao

使用CONSTANT的风险更大，因为如果忘记使用额外级别的间接寻址，则访问的有可能是指向变量的导入地址表的指针，而不是变量本身。

Using CONSTANT is more risky because if you forget to use the extra level of indirection, you could potentially access the import address table's pointer to the variable - not the variable itself.

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