先生待我长大娶我好吗姑娘等你长大嫁我好吗
[xiān shēng dài wŏ zhăng dà qŭ wŏ hăo ma gū niáng dĕng nĭ zhăng dà jià wŏ hăo ma]
It translates to 'Sir, please wait until I grow up before you marry me, will you? Miss, would you wait until you grow up and then marry me?' It's a playful way for a couple to refer to each other indicating a promise made during childhood, awaiting adulthood to fulfill, symbolizing youthful love or innocence.