洋葱流泪柠檬心酸
        
            [yáng cōng liú lèi níng méng xīn suān]
        
        
            Literally translated, 'Onions make me cry, lemons leave a sour taste'. These food-related expressions are metaphors for poignant emotions, where onions causing tears can represent sharp sadness while lemons suggest bitterness or melancholy moods.