Reading is a slogan against noise.

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

Heart to heart communication requires quiet listening.

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

Speak loudly in class; Keep quiet after class.

Your whispering is a respect for everyone.

Let's cheer loudly in the future.

Today, let's study quietly.