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，这一点在谷歌浏览器【最新下载地址】中也有详细论述
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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).
Discovered in Northamptonshire, Machin says it could have belonged to an active or former Roman gladiator, or even be a spectator's souvenir, even though there is no evidence of an arena or circus space in that part of the country.