After the horseplay by the wicked students, the classroom floor was strewn with crumbled chalk dust.那班顽皮学生闹著玩儿，捏碎不少粉笔，过后，教室地板上撒满了粉笔灰。
At first it was only horseplay but it soon got out of hand and developed into full-scale fight.开始那只是喧闹的嬉戏，可是很快就失去了控制，发展成了全面的斗殴。