1. 罪犯;犯錯的人 When you are talking about a crime or something wrong that has been done, you can refer to the person who did it as the culprit .
e.g. All the men were being deported even though the real culprits in the fight have not been identified. 盡管真兇尚未查出，所有參與斗毆的男子均被驅逐出境。
2. 引起問(wèn)題(或不利情勢)的事物 When you are talking about a problem or bad situation, you can refer to its cause as the culprit .
culprit的反義詞
e.g. About 10% of Japanese teenagers are overweight. Nutritionists say the main culprit is increasing reliance on Western fast food. 大約10%的日本青少年超重。營(yíng)養學(xué)家指出主要原因是對西式快餐越來(lái)越依賴(lài)。