During congestion conditions, a priority class cannot use any excess bandwidth.
在发生拥塞期间,优先级队列不能使用任何超额的带宽。
The queueing system imposes an important exception to this rule with a priority class.
这个排队系统在 prioirty 类(class)上增加了重要的规则。
The base priority computed based on the priority class that all threads run relative to.
根据所有线程相对其运行的优先级类而计算出的基本优先级。