nicotine group

例句：

1. 1.The study found that nicotine exposure could lead to addiction in some people.
   研究发现，尼古丁暴露可能导致某些人上瘾。
2. 2.The group was formed to promote smoking cessation programs.
   该团体成立的目的是推广戒烟项目。
3. 3. Nicotine is a highly addictive substance, and its withdrawal symptoms can be severe.
   尼古丁是一种高度成瘾的物质，其戒断症状可能会很严重。