我非柠檬何为心酸我非雪碧何为心凉
[wŏ fēi níng méng hé wéi xīn suān wŏ fēi xuĕ bì hé wéi xīn liáng]
It’s an expression playing on the brands of beverages: lemonade gives the sourness feeling, and Sprite provides refreshing cooling effect, metaphorically comparing personal experiences such as feelings of bitterness or loneliness to flavors.