我非柠檬为和比柠檬还心酸
[wŏ fēi níng méng wéi hé bĭ níng méng hái xīn suān]
'I am not a lemon, but why do I feel more sour than a lemon?' Lemons symbolize heartache, sadness. This conveys feeling particularly sad or emotionally hurt, beyond what one might expect in certain situations.