“肇事者”用英语怎么说

他向当局告发了肇事者.He denounced the offenders to the authorities.由乔的中耳通往他的咽喉的耳咽管是肇事者.The eustachian tube, leading from the middle ear to Joe's throat, is the culprit.我不知道灾祸从何时起,也不知道肇事者是谁.We do not know what led to the disas...