由那夕阳蜕掉了一身的冷漠由那夕阳蜕掉了一身的稚气
[yóu nèi xī yáng tuì diào le yī shēn de lĕng mò yóu nèi xī yáng tuì diào le yī shēn de zhì qì]
It translates to 'under the sunset sheds the cold indifference; also under the sunset sheds childlike naivety'. This conveys growing older and wiser under sunset light, leaving behind youth’s innocence and callous attitudes developed through time and maturation.