When you smilewhen you smile a light shines in your eye when you smilea rainbow fills the sky Smile is a kind of language which cannot be heard by anyone, but persons always know its meaning.When you meet your friends in the morning, smile means “Good morning !”When you fail, the friends smile means “Have another try ！” So when you smile, although you dont say any word, you can understand each other.Life is like a mirror. If we smile at life, life will smile on us in return.So when you smile, the world love him, When he laughed, the world became afraid of him.当你微笑时，世界爱了他；当他大笑时，世界便怕了他Smile is the best service, intention is the most beautiful smile.微笑是最优的服务，用心是最美的微笑A mothers smile is like the sunshine breaking through a dark cloud.母亲的微笑就像穿透乌云的阳光。Smile is our best friendsAnd its our good memory of childhood.Smile is the best gift to the lovers.The smile on the man and the wife.Sometimes , smile is a secret between close friends.Sometimes , smile show a love between an old couple.Sometimes , smile is a way of communicating with animals.