薄荷只凉酸心人柠檬只酸凉梦人
[bó hé zhĭ liáng suān xīn rén níng méng zhĭ suān liáng mèng rén]
'Mint is cool and hurts the one with a broken heart; lemon is sour and chills the one dreaming.' It implies both mint and lemon are refreshing but they can bring different bitter feelings to individuals according to situations, like reminding one of the heartbreak.