illegal element

例句：

1. 1. The company's product has been found to contain an illegal element.
   该公司的产品被发现含有非法成分。
2. 2. The investigation into the incident revealed an illegal element in the system.
   对这一事件的调查揭示了系统中的非法元素。
3. 3.The new policy aims to eliminate any illegal elements from the workplace.
   新政策的目标是消除工作场所的任何非法元素。