他是太阳他会发光她是月亮她很暗淡
[tā shì tài yáng tā huì fā guāng tā shì yuè liàng tā hĕn àn dàn]
He's the Sun, she's pale as moonlight. This portrays contrasting characters where one individual shines bright (confident, outgoing) and another prefers being understated and calm.