姑娘眼睛多美不适合流泪少年嘴唇多嫩不适合吸烟
[gū niáng yăn jīng duō mĕi bù shì hé liú lèi shăo nián zuĭ chún duō nèn bù shì hé xī yān]
This translates to 'The girl's eyes are so beautiful they're not suited to crying. The boy's lips are too tender to be suited to smoking.' It emphasizes the innocence and natural beauty of youth while contrasting them with negative actions or emotions usually associated with adults such as weeping or smoking.