fractious

那群吵闹的孩子在教室里变得越来越难管。

The ___fractious children grew increasingly unruly in the classroom.

这个fractious话题引发了激烈的争论，导致会议被迫中断。

The ___fractious topic sparked heated debates, forcing the meeting to be adjourned.

教室里满是难以管教的孩子，老师努力维持着课堂秩序。

The teacher struggled to maintain order in the ___fractious classroom full of unruly children.