为什么她会发光呀因为她是电灯泡呀
[wéi shén me tā huì fā guāng yā yīn wéi tā shì diàn dēng pào yā]
A playful metaphor meaning 'Why does she shine? Because she is the light bulb.' It compares someone who stands out in a group (often used in the context of third-wheeling or being the odd one out) to an illuminating presence.