一生的她一世的他
[yī shēng de tā yī shì de tā]
A romantic expression emphasizing the uniqueness and importance of one specific person in one's whole life. '一生的她'(The she of one's whole life) and '一世的他'(The he of one's entire lifetime) reflect a deep love or strong connection that will last a lifetime, indicating they think the other side is their only love partner and nobody else could replace them