我爱的少年笑起来很美我爱的姑娘笑起来很甜
[wŏ ài de shăo nián xiào qĭ lái hĕn mĕi wŏ ài de gū niáng xiào qĭ lái hĕn tián]
'The boy I love has a beautiful smile; the girl I love smiles sweetly'. This expresses affection towards someone(s) special to the user, reflecting joy derived from their loved ones' presence.