中间发生的

例句：

1. 1.The teacher had to intervene when the students started fighting in the classroom.
   当学生们在教室里开始打架时，老师不得不介入。
2. 2. He intervened on behalf of his friend when they were unfairly accused.
   他代表他的一个朋友，当他们被不公平地指控时。
3. 3. The government has been intervening in the conflict between the two countries.
   政府一直在这两个国家之间的冲突中进行干预。