1·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》
2·Yet one culprit is not only rarely seen as an offender, but is also being cosseted and protected.
然而，由一个罪犯不仅没被看成是罪犯，反而备受宠爱的被保护了起来。
3·The main culprit, LDL (for low-density lipoprotein), is the body's oil truck, circulating in the blood, delivering fat and cholesterol to the cells.
主要的“罪犯”是低密度脂蛋白胆固醇，它是身体的运油车，在血液里向细胞传输脂肪和胆固醇。
4·In the past few years, a new potential culprit has emerged: gut bacteria.
在过去的几年里，一种新型的潜在罪犯出现了：肠道细菌。
5·Sometimes the culprit will have left obvious tracks and his work will be downright clumsy.
有时候罪犯会留下明显的痕迹，简直是笨得可以。