unlawful activity

例句：

1. 1.The government is cracking down on unlawful activities in the city.
   政府正在打击城市中的非法活动。
2. 2. Thepolice are investigating a seriesof unlawful activities thathave occurred recently.
   警方正在调查最近发生的一连串非法活动。
3. 3. The suspect was arrestedfor engaging in unlawful activities duringthe protest.
   嫌疑人因在抗议活动中从事非法活动而被逮捕。