culprits
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.
All the men were being deported even though the real culprits in the fight have not been identified.
尽管真凶尚未查出,但所有参与斗殴的男子都正被驱逐出境。
When you are talking about a problem or bad situation, you can refer to its cause as the culprit.
About 10 of Japanese teenagers are overweight. Nutritionists say the main culprit is increasing reliance on Western fast food.
约10的日本青少年都超重。营养学家们称主要的原因是他们越来越依赖西方快餐。