Students mustn't talk during lessons.

英 美
  • during prep.在...期间
  • lessons n.教训;课,功课,课业;榜样,典范vt.教训,告诫,训斥;给...上课
  • students 学生
  • talk v.交谈;商讨;演讲;阐述;劝服n.谈话;会谈;讨论;讲话;空谈