1, affecting other students: wearing slippers into the library will make a noise, affect other students' study and mood, and attract other students' strange eyes.

2, unsightly: In this solemn and rigorous occasion of the library, wearing slippers is very unsightly, and some students are more likely to have an unsightly sitting posture after wearing slippers.

3. Vibration will do harm to books: this kind of vibration may not be felt much at ordinary times, and this subtle sound is not something we can distinguish, but as long as there is sound, it will actually be accompanied by vibration.