maps two-dimensional physical addresses
... of a two tuple（一个逻辑地址是两个向量的集合）: – maps two-dimensional physical addresses; each table entry has（段表 - 映射二维物理地址，每个表项包括）: base– contains the starting physical address where the segments reside in memory.
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maps two-dimensional physical addresses
映射二维物理地址
以上为机器翻译结果，长、整句建议使用 人工翻译 。