culprit
n. 罪犯，过失者；问题的起因
复数 culprits
例句
Police collared the culprit as he was leaving the premises.
罪犯正离开现场时，警察逮住了他。
《牛津词典》
The police followed home the clue and finally caught the culprit.
警察根据线索追根到底，终于抓住了这个罪犯。
《新英汉大辞典》
The main culprit in the current crisis seems to be modern farming techniques.
当前这场危机的罪魁祸首好像是现代农业技术。
