这个排队系统在 prioirty类（class）上增加了重要的规则。

The queueing system imposes an important exception to this rule with a priority class.

youdao

这个排队系统在 prioirty类（class）上增加了重要的规则。

The queueing system imposes an important exception to this rule with a priority class.

youdao