// 作用：缓存当前位置右侧的"参考身高"，快速判断能看到的人
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.，更多细节参见搜狗输入法下载
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In addition to the purchase price of $31 per WBD share, Paramount's latest offer also included a provision that it would cover the $2.8 billion termination fee that WBD would owe to Netflix for dissolving the existing merger agreement between the businesses. So rather than paying $82.7 billion to acquire the Warner Bros. part of the operation, it appears Netflix may walk away with no new content but padding its coffers with an extra nearly $3 billion.