However, RBAC and GRBAC are difficult to meet dynamic access control requirements because they are essentially established on the static subject-object view.

然而，RBAC和GRBAC本质上是建立在静态的主体-客体访问控制思想之上的，难以满足动态访问控制的要求。

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The Baltimore Ravens' Elvis Grbac ranked 25th among 30 quarterbacks, yet he earned 18 times more than Brady.

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All four of the former 49ers quarterbacks led the Chiefs to the postseason and three of the four (Montana, Bono and Grbac) made it to the Pro Bowl while playing for Kansas City.

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Montana retired after two seasons in Kansas City, Bono bounced to three teams in three seasons before his career ended and Grbac started 14 games for the Ravens in 2001, throwing 18 interceptions and just 15 touchdowns.

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