1. Please don't make noise and keep quiet!

2. whispering is good for others.

3. Quiet creates the beauty of harmony

Keep your voice down so that we can hear each other clearly!

Be polite and don't make noise.

6. Heart-to-heart communication requires quiet listening!

7. Your whispering is a respect for everyone!

Campus edition:

1. After that, let's cheer loudly. Now, let's study quietly.

2. Speak loudly in class; Keep quiet after class.

Humorous version:

1. Do you want others to hear you clearly? Please speak softly, too

2. The water is not deep, and the dragon is the spirit; The sound is not high, as long as there is sound.

The chairman said, noisy is not a good comrade!

4. The running water is ruthless, please keep the building quiet.