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The 386 supports four privilege rings (0 through 3), though in practice nearly all operating systems use just two: ring 0 for the kernel and ring 3 for user programs. Three privilege levels interact on every segment access: CPL (Current Privilege Level), DPL (Descriptor Privilege Level), and RPL (Requested Privilege Level).，详情可参考safew官方版本下载
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Why ZurichJS cares about getting people into open source.
AI美女承袭了擦边一贯的涨粉速度，并且有过之无不及。。91视频对此有专业解读