Virtual memory is conceptually simple but potentially devastating to performance. Every memory access must go through segmentation (add segment base, check limit) and then paging (look up the page table). Naively, paging alone requires two additional memory reads per access -- one for the page directory entry, one for the page table entry.
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（三）违反监察机关在监察工作中、司法机关在刑事诉讼中依法采取的禁止接触证人、鉴定人、被害人及其近亲属保护措施的。。关于这个话题，heLLoword翻译官方下载提供了深入分析
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Фото: Stringer / Reuters