你是我致命的伤害你是我致命的祸害
[nĭ shì wŏ zhì mìng de shāng hài nĭ shì wŏ zhì mìng de huò hài]
The meaning here is that the other person has caused significant emotional pain and harm. It describes someone who has been emotionally hurt in an irreplaceable and profound way by another.