Smile is a good state of mind, show the bottom of my heart calm, happy;

⊙、微笑是人良好心境的表现，说明心底平和，心情愉快；

youdao

Smile is a good state of mind, show the bottom of my heart calm, happy;

⊙、微笑是人良好心境的表现，说明心底平和，心情愉快；

youdao