每个边缘点具有正常矢量指向在垂直的方向上的边缘。

Each edge point has a normal vector pointing in the direction perpendicular to the edge.

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来自高优先级矢量的微线程先得到服务，随后是来自正常优先级矢量的微线程。

Tasklets from the high-priority vector are serviced first, followed by those on the normal vector.

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