A short message apologizing to the teacher.

Teacher, I play with my mobile phone in class because your lecture is not exciting enough to attract my attention, so that my eyes are always on my mobile phone and my hands are always touching it. Of course, it is my fault to play mobile phone in class, but playing mobile phone in class is not only my responsibility, but also your responsibility. When students make mistakes, don't just blame them, but sometimes think about their own reasons.