active nucleus

例句：

1. 1. The team is active in promoting environmental protection.
   该团队积极推广环境保护。
2. 2. The new manager has a very active approach to problem-solving.
   新任经理对解决问题非常积极。
3. 3. She is an active member of the community club.
   她是社区俱乐部的积极成员。