柠檬与少年西瓜与少女
[níng méng yŭ shăo nián xī guā yŭ shăo nǚ]
'Lemon and young boy, watermelon and young girl' paints a picture of youthful and sweet experiences. Lemons may imply freshness or slight sourness of teenage days while watermelons bring out sweetness and summertime enjoyment for girls.