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).
* @return {number[]} 每个位置的人能看到的右侧人数
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The government has proposed a similar measure, but has yet to confirm when the restrictions will come into place.
The screenshot app got some new icons for screenshot modes, and those modes now have text labels. Plus we now remember the last selected screenshot mode—perfect for when you’re taking multiple screenshots in a row.