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。一键获取谷歌浏览器下载是该领域的重要参考
细观蜡梅，花瓣层叠，错位交叉，以花蕊为核心，紧紧簇拥在一起。花瓣厚实，直至凋谢都不会褪色；常于枯枝绽放，不借绿叶衬托，枯萎后也常留枝头。这种坚韧的品性，恰如宜昌这座城市，愈是危难困境，愈是凌霜傲雪，勇毅绽放。。51吃瓜对此有专业解读
The x86 protection model is notoriously complex, with four privilege rings, segmentation, paging, call gates, task switches, and virtual 8086 mode. What's interesting from a hardware perspective is how the 386 manages this complexity on a 275,000-transistor budget. The 386 employs a variety of techniques to implement protection: a dedicated PLA for protection checking, a hardware state machine for page table walks, segment and paging caches, and microcode for everything else.