薄荷加冰多心凉柠檬加醋好心酸
[bó hé jiā bīng duō xīn liáng níng méng jiā cù hăo xīn suān]
Here the user is expressing feelings using foods and drinks. A hint of mint makes iced beverages refreshing, but too many ice cubes would only leave you feeling coolness, while lemons themselves being already sour become even more unpleasant to taste when mixed in vinegar, all referring to bitter sentiments.