active stage of rheumatic fever

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主动。
3. 3. The students are active participants in the class discussions.
   学生们是课堂讨论的积极参与者。