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。

youdao

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。

youdao