我非柠檬为何比柠檬还心酸我非薄荷为何比薄荷还心凉
[wŏ fēi níng méng wéi hé bĭ níng méng hái xīn suān wŏ fēi bó hé wéi hé bĭ bó hé hái xīn liáng]
The person is expressing deep emotional pain by saying, although they are not a lemon or mint, why do they feel more bitter than a lemon and cooler than mint. Here, ‘lemon’ refers to being heartbroken, while ‘mint’ represents feeling cold-hearted due to unreciprocated love.