一个音乐学院的学生选修我的课。一开始见到他时,他总是一副无精打采的样子,有时甚至还在课堂上打瞌睡。一次课后我们随意地聊起来,我才知道他学的是钢琴专业。我问他:“为什么有时上课无精打采的?”他说:“老师,我每天晚上在酒店打工,回学校很晚,所以上课会犯困。” A music college student takes my class. When he first met him, he was always listless and sometimes even asleep in class. After a class we talked at random, I learned that he studied piano major. I asked him: “Why do you sometimes attend class? ” He said: “Teacher, I work every night in the hotel and go back to school very late, so class will be sleepy. ”