心如柠檬天然酸心如薄荷天然凉
[xīn rú níng méng tiān rán suān xīn rú bó hé tiān rán liáng]
A Lemon-Heart, Naturally Sour and Menthol-Cool Heart conveys that someone has a heart full of naturally occurring strong flavors that might symbolize complex emotional responses both warm-hearted or sour and cooling effect respectively suggesting mixed feelings or bittersweet experience.