英音 /ˈpɜː.pə.treɪ.tə(r)/

美音 /ˈpɝː.pə.treɪ.t̬ɚ/

[ noun C ] someone who has committed a crime or a violent or harmful act (US informal perp /pɝːp/)
犯罪者；行凶者；作恶者

例句：

The perpetrators of the massacre must be brought to justice as war criminals. 大屠杀的参与者必须作为战犯绳之以法。

The perpetrators of this evil deed must be brought to justice. 必须将参与这一恶行的凶手绳之以法。

And almost every sector of society is a perpetrator. 而且社会的几乎所有部门都有责任。

The perpetrators are now certain to face justice within a year. 这些黑暗份子们将在一年之内面临最终审判。