// 解释：第一个有效数字不能是0，栈空时存0无意义，直接跳过
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.
，更多细节参见heLLoword翻译官方下载
參與手術的外科醫生表示，這次誕生是「一個突破性的時刻」，可能為許多有相同診斷的女性帶來希望。，详情可参考爱思助手下载最新版本
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