someone who has done something wrong过失者;责任人
Police hope the public will help them to find the culprits.警方希望公众能协助他们抓到罪犯。
a fact or situation that is the reason for something bad happening问题的起因;罪魁祸首
Children in this country are getting much too fat, and sugar and sweets are the main culprits.该国儿童过于肥胖,糖和甜食是罪魁祸首。