The permissions sets of the caller class and its ancestors (that is, all stack frames above this one) are not included in computing the intersection set.
调用类和它的上级（即所有在它 上面的堆栈帧）的权限集都 不包括在交集计算中。
Now that you understand the concept of platform computing, let's figure out what a solution stack is.
既然理解了计算平台的概念，现在就来看看什么是解决方案堆。
Most vendors are now trying to offer the complete stack – a move towards a more converged, fabric computing environment for data centers.
现在，大多数厂商试图提供完整的框架- 迈向一个面向数据中心的更加融合的计算环境的架构。
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