刘海掩盖不住内心的悲伤
        
            [liú hăi yăn gài bù zhù nèi xīn de bēi shāng]
        
        
            'Fringe (bangs) cannot hide inner sorrow.' This implies that superficial appearances (like fringe/bangs) cannot mask deep, inner sadness. It emphasizes the contrast between external appearance and true emotion.