求翻译：第三，对我们的耳朵有害；第四，一边听歌一边和别人说话是不礼貌的；第五，学生不能分清场合使用，例如在上课时使用，在睡觉时听，那都是不好的，是什么意思？

Third, harmful to our ears; Fourth, listen to songs while talking with others is impolite; Fifth, students can not distinguish between occasions, for example, to use in class, listening during sleep, it is not good ,

The first 3, harmful to our ears; the first 4 songs, and others when one side is not polite; 5 occasions, students will be unable to clearly distinguish between using, for example, in the classroom use to sleep and that would be bad.

Third, is harmful to our ear; Fourth, on the one hand listens to on the other hand the song and others speech not politeness; Fifth, the student cannot distinguish clearly the situation use, for example when attends class uses, when sleeps listens, that all is not good,

Third, harmful to our ears; IV, listening to songs and others is not polite to speak; v, students cannot think about where you are using, such as used in class, while sleeping, that was not good,

Third, harmful to our ears; Fourth, listen to songs while talking with others is impolite; Fifth, students can not distinguish between occasions, for example, to use in class, listening during sleep, it is not good ,